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Globals

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Note

This reference is no longer being maintained. For the latest API reference, see WebView2 API Reference.

Summary

Members Descriptions
COREWEBVIEW2_BOUNDS_MODE Mode for how the Bounds property is interpreted in relation to the RasterizationScale property.
COREWEBVIEW2_BROWSER_PROCESS_EXIT_KIND Specifies the browser process exit type used in the ICoreWebView2BrowserProcessExitedEventArgs interface.
COREWEBVIEW2_BROWSING_DATA_KINDS Specifies the datatype for the ICoreWebView2Profile2::ClearBrowsingData method.
COREWEBVIEW2_CAPTURE_PREVIEW_IMAGE_FORMAT Specifies the image format for the ICoreWebView2::CapturePreview method.
COREWEBVIEW2_CLIENT_CERTIFICATE_KIND Specifies the client certificate kind.
COREWEBVIEW2_CONTEXT_MENU_ITEM_KIND Specifies the menu item kind for the ICoreWebView2ContextMenuItem::get_Kind method.
COREWEBVIEW2_CONTEXT_MENU_TARGET_KIND Indicates the kind of context for which the context menu was created for the ICoreWebView2ContextMenuTarget::get_Kind method.
COREWEBVIEW2_COOKIE_SAME_SITE_KIND Kind of cookie SameSite status used in the ICoreWebView2Cookie interface.
COREWEBVIEW2_DEFAULT_DOWNLOAD_DIALOG_CORNER_ALIGNMENT The default download dialog can be aligned to any of the WebView corners by setting the DefaultDownloadDialogCornerAlignment property.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON Reason why a download was interrupted.
COREWEBVIEW2_DOWNLOAD_STATE State of the download operation.
COREWEBVIEW2_FAVICON_IMAGE_FORMAT Specifies the image format to use for favicon.
COREWEBVIEW2_HOST_RESOURCE_ACCESS_KIND Kind of cross origin resource access allowed for host resources during download.
COREWEBVIEW2_KEY_EVENT_KIND Specifies the key event type that triggered an AcceleratorKeyPressed event.
COREWEBVIEW2_MOUSE_EVENT_KIND Mouse event type used by SendMouseInput to convey the type of mouse event being sent to WebView.
COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS Mouse event virtual keys associated with a COREWEBVIEW2_MOUSE_EVENT_KIND for SendMouseInput.
COREWEBVIEW2_MOVE_FOCUS_REASON Specifies the reason for moving focus.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS Specifies the PDF toolbar item types used for the ICoreWebView2Settings::put_HiddenPdfToolbarItems method.
COREWEBVIEW2_PERMISSION_KIND Indicates the type of a permission request.
COREWEBVIEW2_PERMISSION_STATE Specifies the response to a permission request.
COREWEBVIEW2_POINTER_EVENT_KIND Pointer event type used by SendPointerInput to convey the type of pointer event being sent to WebView.
COREWEBVIEW2_PREFERRED_COLOR_SCHEME An enum to represent the options for WebView2 color scheme: auto, light, or dark.
COREWEBVIEW2_PRINT_COLLATION Specifies the collation for a print.
COREWEBVIEW2_PRINT_COLOR_MODE Specifies the color mode for a print.
COREWEBVIEW2_PRINT_DIALOG_KIND Specifies the print dialog kind.
COREWEBVIEW2_PRINT_DUPLEX Specifies the duplex option for a print.
COREWEBVIEW2_PRINT_MEDIA_SIZE Specifies the media size for a print.
COREWEBVIEW2_PRINT_ORIENTATION The orientation for printing, used by the Orientation property on ICoreWebView2PrintSettings.
COREWEBVIEW2_PRINT_STATUS Indicates the status for printing.
COREWEBVIEW2_PROCESS_FAILED_KIND Specifies the process failure type used in the ICoreWebView2ProcessFailedEventHandler interface.
COREWEBVIEW2_PROCESS_FAILED_REASON Specifies the process failure reason used in the ICoreWebView2ProcessFailedEventHandler interface.
COREWEBVIEW2_PROCESS_KIND Indicates the process type used in the ICoreWebView2ProcessInfo interface.
COREWEBVIEW2_SCRIPT_DIALOG_KIND Specifies the JavaScript dialog type used in the ICoreWebView2ScriptDialogOpeningEventHandler interface.
COREWEBVIEW2_SERVER_CERTIFICATE_ERROR_ACTION Specifies the action type when server certificate error is detected to be used in the ICoreWebView2ServerCertificateErrorDetectedEventArgs interface.
COREWEBVIEW2_TRACKING_PREVENTION_LEVEL Tracking prevention levels.
COREWEBVIEW2_WEB_ERROR_STATUS Indicates the error status values for web navigations.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT Specifies the web resource request contexts.
COREWEBVIEW2_COLOR A value representing RGBA color (Red, Green, Blue, Alpha) for WebView2.
CompareBrowserVersions This method is for anyone want to compare version correctly to determine which version is newer, older or same.
CreateCoreWebView2Environment Creates an evergreen WebView2 Environment using the installed WebView2 Runtime version.
CreateCoreWebView2EnvironmentWithOptions DLL export to create a WebView2 environment with a custom version of WebView2 Runtime, user data folder, and with or without additional options.
GetAvailableCoreWebView2BrowserVersionString Get the browser version info including channel name if it is not the WebView2 Runtime.

Members

COREWEBVIEW2_BOUNDS_MODE

enum COREWEBVIEW2_BOUNDS_MODE

Values Descriptions
COREWEBVIEW2_BOUNDS_MODE_USE_RAW_PIXELS Bounds property represents raw pixels. Physical size of Webview is not impacted by RasterizationScale.
COREWEBVIEW2_BOUNDS_MODE_USE_RASTERIZATION_SCALE Bounds property represents logical pixels and the RasterizationScale property is used to get the physical size of the WebView.

Mode for how the Bounds property is interpreted in relation to the RasterizationScale property.

COREWEBVIEW2_BROWSER_PROCESS_EXIT_KIND

enum COREWEBVIEW2_BROWSER_PROCESS_EXIT_KIND

Values Descriptions
COREWEBVIEW2_BROWSER_PROCESS_EXIT_KIND_NORMAL Indicates that the browser process ended normally.
COREWEBVIEW2_BROWSER_PROCESS_EXIT_KIND_FAILED Indicates that the browser process ended unexpectedly.

Specifies the browser process exit type used in the ICoreWebView2BrowserProcessExitedEventArgs interface.

COREWEBVIEW2_BROWSING_DATA_KINDS

enum COREWEBVIEW2_BROWSING_DATA_KINDS

Values Descriptions
COREWEBVIEW2_BROWSING_DATA_KINDS_FILE_SYSTEMS Specifies file systems data.
COREWEBVIEW2_BROWSING_DATA_KINDS_INDEXED_DB Specifies data stored by the IndexedDB DOM feature.
COREWEBVIEW2_BROWSING_DATA_KINDS_LOCAL_STORAGE Specifies data stored by the localStorage DOM API.
COREWEBVIEW2_BROWSING_DATA_KINDS_WEB_SQL Specifies data stored by the Web SQL database DOM API.
COREWEBVIEW2_BROWSING_DATA_KINDS_CACHE_STORAGE Specifies data stored by the CacheStorage DOM API.
COREWEBVIEW2_BROWSING_DATA_KINDS_ALL_DOM_STORAGE Specifies DOM storage data, now and future.
COREWEBVIEW2_BROWSING_DATA_KINDS_COOKIES Specifies HTTP cookies data.
COREWEBVIEW2_BROWSING_DATA_KINDS_ALL_SITE Specifies all site data, now and future.
COREWEBVIEW2_BROWSING_DATA_KINDS_DISK_CACHE Specifies disk cache.
COREWEBVIEW2_BROWSING_DATA_KINDS_DOWNLOAD_HISTORY Specifies download history data.
COREWEBVIEW2_BROWSING_DATA_KINDS_GENERAL_AUTOFILL Specifies general autofill form data.
COREWEBVIEW2_BROWSING_DATA_KINDS_PASSWORD_AUTOSAVE Specifies password autosave data.
COREWEBVIEW2_BROWSING_DATA_KINDS_BROWSING_HISTORY Specifies browsing history data.
COREWEBVIEW2_BROWSING_DATA_KINDS_SETTINGS Specifies settings data.
COREWEBVIEW2_BROWSING_DATA_KINDS_ALL_PROFILE Specifies profile data that should be wiped to make it look like a new profile.

Specifies the datatype for the ICoreWebView2Profile2::ClearBrowsingData method.

COREWEBVIEW2_CAPTURE_PREVIEW_IMAGE_FORMAT

enum COREWEBVIEW2_CAPTURE_PREVIEW_IMAGE_FORMAT

Values Descriptions
COREWEBVIEW2_CAPTURE_PREVIEW_IMAGE_FORMAT_PNG Indicates that the PNG image format is used.
COREWEBVIEW2_CAPTURE_PREVIEW_IMAGE_FORMAT_JPEG Indicates the JPEG image format is used.

Specifies the image format for the ICoreWebView2::CapturePreview method.

COREWEBVIEW2_CLIENT_CERTIFICATE_KIND

enum COREWEBVIEW2_CLIENT_CERTIFICATE_KIND

Values Descriptions
COREWEBVIEW2_CLIENT_CERTIFICATE_KIND_SMART_CARD Specifies smart card certificate.
COREWEBVIEW2_CLIENT_CERTIFICATE_KIND_PIN Specifies PIN certificate.
COREWEBVIEW2_CLIENT_CERTIFICATE_KIND_OTHER Specifies other certificate.

Specifies the client certificate kind.

COREWEBVIEW2_CONTEXT_MENU_ITEM_KIND

enum COREWEBVIEW2_CONTEXT_MENU_ITEM_KIND

Values Descriptions
COREWEBVIEW2_CONTEXT_MENU_ITEM_KIND_COMMAND Specifies a command menu item kind.
COREWEBVIEW2_CONTEXT_MENU_ITEM_KIND_CHECK_BOX Specifies a check box menu item kind.
COREWEBVIEW2_CONTEXT_MENU_ITEM_KIND_RADIO Specifies a radio button menu item kind.
COREWEBVIEW2_CONTEXT_MENU_ITEM_KIND_SEPARATOR Specifies a separator menu item kind.
COREWEBVIEW2_CONTEXT_MENU_ITEM_KIND_SUBMENU Specifies a submenu menu item kind.

Specifies the menu item kind for the ICoreWebView2ContextMenuItem::get_Kind method.

COREWEBVIEW2_CONTEXT_MENU_TARGET_KIND

enum COREWEBVIEW2_CONTEXT_MENU_TARGET_KIND

Values Descriptions
COREWEBVIEW2_CONTEXT_MENU_TARGET_KIND_PAGE Indicates that the context menu was created for the page without any additional content.
COREWEBVIEW2_CONTEXT_MENU_TARGET_KIND_IMAGE Indicates that the context menu was created for an image element.
COREWEBVIEW2_CONTEXT_MENU_TARGET_KIND_SELECTED_TEXT Indicates that the context menu was created for selected text.
COREWEBVIEW2_CONTEXT_MENU_TARGET_KIND_AUDIO Indicates that the context menu was created for an audio element.
COREWEBVIEW2_CONTEXT_MENU_TARGET_KIND_VIDEO Indicates that the context menu was created for a video element.

Indicates the kind of context for which the context menu was created for the ICoreWebView2ContextMenuTarget::get_Kind method.

This enum will always represent the active element that caused the context menu request. If there is a selection with multiple images, audio and text, for example, the element that the end user right clicks on within this selection will be the option represented by this enum.

enum COREWEBVIEW2_COOKIE_SAME_SITE_KIND

Values Descriptions
COREWEBVIEW2_COOKIE_SAME_SITE_KIND_NONE None SameSite type. No restrictions on cross-site requests.
COREWEBVIEW2_COOKIE_SAME_SITE_KIND_LAX Lax SameSite type. The cookie will be sent with "same-site" requests, and with "cross-site" top level navigation.
COREWEBVIEW2_COOKIE_SAME_SITE_KIND_STRICT Strict SameSite type. The cookie will only be sent along with "same-site" requests.

Kind of cookie SameSite status used in the ICoreWebView2Cookie interface.

These fields match those as specified in https://developer.mozilla.org/docs/Web/HTTP/Cookies#. Learn more about SameSite cookies here: https://tools.ietf.org/html/draft-west-first-party-cookies-07

COREWEBVIEW2_DEFAULT_DOWNLOAD_DIALOG_CORNER_ALIGNMENT

enum COREWEBVIEW2_DEFAULT_DOWNLOAD_DIALOG_CORNER_ALIGNMENT

Values Descriptions
COREWEBVIEW2_DEFAULT_DOWNLOAD_DIALOG_CORNER_ALIGNMENT_TOP_LEFT Top-left corner of the WebView.
COREWEBVIEW2_DEFAULT_DOWNLOAD_DIALOG_CORNER_ALIGNMENT_TOP_RIGHT Top-right corner of the WebView.
COREWEBVIEW2_DEFAULT_DOWNLOAD_DIALOG_CORNER_ALIGNMENT_BOTTOM_LEFT Bottom-left corner of the WebView.
COREWEBVIEW2_DEFAULT_DOWNLOAD_DIALOG_CORNER_ALIGNMENT_BOTTOM_RIGHT Bottom-right corner of the WebView.

The default download dialog can be aligned to any of the WebView corners by setting the DefaultDownloadDialogCornerAlignment property.

The default position is top-right corner.

COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON

enum COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON

Values Descriptions
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_NONE
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_FAILED Generic file error.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_ACCESS_DENIED Access denied due to security restrictions.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_NO_SPACE Disk full.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_NAME_TOO_LONG Result file path with file name is too long.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_TOO_LARGE File is too large for file system.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_MALICIOUS Microsoft Defender Smartscreen detected a virus in the file.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_TRANSIENT_ERROR File was in use, too many files opened, or out of memory.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_BLOCKED_BY_POLICY File blocked by local policy.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_SECURITY_CHECK_FAILED Security check failed unexpectedly.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_TOO_SHORT Seeking past the end of a file in opening a file, as part of resuming an interrupted download.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_FILE_HASH_MISMATCH Partial file did not match the expected hash and was deleted.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_NETWORK_FAILED Generic network error. User can retry the download manually.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_NETWORK_TIMEOUT Network operation timed out.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_NETWORK_DISCONNECTED Network connection lost. User can retry the download manually.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_NETWORK_SERVER_DOWN Server has gone down. User can retry the download manually.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_NETWORK_INVALID_REQUEST Network request invalid because original or redirected URI is invalid, has an unsupported scheme, or is disallowed by network policy.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_SERVER_FAILED Generic server error. User can retry the download manually.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_SERVER_NO_RANGE Server does not support range requests.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_SERVER_BAD_CONTENT Server does not have the requested data.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_SERVER_UNAUTHORIZED Server did not authorize access to resource.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_SERVER_CERTIFICATE_PROBLEM Server certificate problem.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_SERVER_FORBIDDEN Server access forbidden.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_SERVER_UNEXPECTED_RESPONSE Unexpected server response.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_SERVER_CONTENT_LENGTH_MISMATCH Server sent fewer bytes than the Content-Length header.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_SERVER_CROSS_ORIGIN_REDIRECT Unexpected cross-origin redirect.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_USER_CANCELED User canceled the download.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_USER_SHUTDOWN User shut down the WebView.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_USER_PAUSED User paused the download.
COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_DOWNLOAD_PROCESS_CRASHED WebView crashed.

Reason why a download was interrupted.

COREWEBVIEW2_DOWNLOAD_STATE

enum COREWEBVIEW2_DOWNLOAD_STATE

Values Descriptions
COREWEBVIEW2_DOWNLOAD_STATE_IN_PROGRESS The download is in progress.
COREWEBVIEW2_DOWNLOAD_STATE_INTERRUPTED The connection with the file host was broken.
COREWEBVIEW2_DOWNLOAD_STATE_COMPLETED The download completed successfully.

State of the download operation.

COREWEBVIEW2_FAVICON_IMAGE_FORMAT

enum COREWEBVIEW2_FAVICON_IMAGE_FORMAT

Values Descriptions
COREWEBVIEW2_FAVICON_IMAGE_FORMAT_PNG Indicates that the PNG image format is used.
COREWEBVIEW2_FAVICON_IMAGE_FORMAT_JPEG Indicates the JPEG image format is used.

Specifies the image format to use for favicon.

COREWEBVIEW2_HOST_RESOURCE_ACCESS_KIND

enum COREWEBVIEW2_HOST_RESOURCE_ACCESS_KIND

Values Descriptions
COREWEBVIEW2_HOST_RESOURCE_ACCESS_KIND_DENY All cross origin resource access is denied, including normal sub resource access as src of a script or image element.
COREWEBVIEW2_HOST_RESOURCE_ACCESS_KIND_ALLOW All cross origin resource access is allowed, including accesses that are subject to Cross-Origin Resource Sharing(CORS) check.
COREWEBVIEW2_HOST_RESOURCE_ACCESS_KIND_DENY_CORS Cross origin resource access is allowed for normal sub resource access like as src of a script or image element, while any access that subjects to CORS check will be denied.

Kind of cross origin resource access allowed for host resources during download.

Note that other normal access checks like same origin DOM access check and Content Security Policy still apply. The following table illustrates the host resource cross origin access according to access context and COREWEBVIEW2_HOST_RESOURCE_ACCESS_KIND.

Cross Origin Access Context DENY ALLOW DENY_CORS
From DOM like src of img, script or iframe element Deny Allow Allow
From Script like Fetch or XMLHttpRequest Deny Allow Deny

COREWEBVIEW2_KEY_EVENT_KIND

enum COREWEBVIEW2_KEY_EVENT_KIND

Values Descriptions
COREWEBVIEW2_KEY_EVENT_KIND_KEY_DOWN Specifies that the key event type corresponds to window message WM_KEYDOWN.
COREWEBVIEW2_KEY_EVENT_KIND_KEY_UP Specifies that the key event type corresponds to window message WM_KEYUP.
COREWEBVIEW2_KEY_EVENT_KIND_SYSTEM_KEY_DOWN Specifies that the key event type corresponds to window message WM_SYSKEYDOWN.
COREWEBVIEW2_KEY_EVENT_KIND_SYSTEM_KEY_UP Specifies that the key event type corresponds to window message WM_SYSKEYUP.

Specifies the key event type that triggered an AcceleratorKeyPressed event.

COREWEBVIEW2_MOUSE_EVENT_KIND

enum COREWEBVIEW2_MOUSE_EVENT_KIND

Values Descriptions
COREWEBVIEW2_MOUSE_EVENT_KIND_HORIZONTAL_WHEEL Mouse horizontal wheel scroll event, WM_MOUSEHWHEEL.
COREWEBVIEW2_MOUSE_EVENT_KIND_LEFT_BUTTON_DOUBLE_CLICK Left button double click mouse event, WM_LBUTTONDBLCLK.
COREWEBVIEW2_MOUSE_EVENT_KIND_LEFT_BUTTON_DOWN Left button down mouse event, WM_LBUTTONDOWN.
COREWEBVIEW2_MOUSE_EVENT_KIND_LEFT_BUTTON_UP Left button up mouse event, WM_LBUTTONUP.
COREWEBVIEW2_MOUSE_EVENT_KIND_LEAVE Mouse leave event, WM_MOUSELEAVE.
COREWEBVIEW2_MOUSE_EVENT_KIND_MIDDLE_BUTTON_DOUBLE_CLICK Middle button double click mouse event, WM_MBUTTONDBLCLK.
COREWEBVIEW2_MOUSE_EVENT_KIND_MIDDLE_BUTTON_DOWN Middle button down mouse event, WM_MBUTTONDOWN.
COREWEBVIEW2_MOUSE_EVENT_KIND_MIDDLE_BUTTON_UP Middle button up mouse event, WM_MBUTTONUP.
COREWEBVIEW2_MOUSE_EVENT_KIND_MOVE Mouse move event, WM_MOUSEMOVE.
COREWEBVIEW2_MOUSE_EVENT_KIND_RIGHT_BUTTON_DOUBLE_CLICK Right button double click mouse event, WM_RBUTTONDBLCLK.
COREWEBVIEW2_MOUSE_EVENT_KIND_RIGHT_BUTTON_DOWN Right button down mouse event, WM_RBUTTONDOWN.
COREWEBVIEW2_MOUSE_EVENT_KIND_RIGHT_BUTTON_UP Right button up mouse event, WM_RBUTTONUP.
COREWEBVIEW2_MOUSE_EVENT_KIND_WHEEL Mouse wheel scroll event, WM_MOUSEWHEEL.
COREWEBVIEW2_MOUSE_EVENT_KIND_X_BUTTON_DOUBLE_CLICK First or second X button double click mouse event, WM_XBUTTONDBLCLK.
COREWEBVIEW2_MOUSE_EVENT_KIND_X_BUTTON_DOWN First or second X button down mouse event, WM_XBUTTONDOWN.
COREWEBVIEW2_MOUSE_EVENT_KIND_X_BUTTON_UP First or second X button up mouse event, WM_XBUTTONUP.

Mouse event type used by SendMouseInput to convey the type of mouse event being sent to WebView.

The values of this enum align with the matching WM_* window messages.

COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS

enum COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS

Values Descriptions
COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS_NONE No additional keys pressed.
COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS_LEFT_BUTTON Left mouse button is down, MK_LBUTTON.
COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS_RIGHT_BUTTON Right mouse button is down, MK_RBUTTON.
COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS_SHIFT SHIFT key is down, MK_SHIFT.
COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS_CONTROL CTRL key is down, MK_CONTROL.
COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS_MIDDLE_BUTTON Middle mouse button is down, MK_MBUTTON.
COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS_X_BUTTON1 First X button is down, MK_XBUTTON1.
COREWEBVIEW2_MOUSE_EVENT_VIRTUAL_KEYS_X_BUTTON2 Second X button is down, MK_XBUTTON2.

Mouse event virtual keys associated with a COREWEBVIEW2_MOUSE_EVENT_KIND for SendMouseInput.

These values can be combined into a bit flag if more than one virtual key is pressed for the event. The values of this enum align with the matching MK_* mouse keys.

COREWEBVIEW2_MOVE_FOCUS_REASON

enum COREWEBVIEW2_MOVE_FOCUS_REASON

Values Descriptions
COREWEBVIEW2_MOVE_FOCUS_REASON_PROGRAMMATIC Specifies that the code is setting focus into WebView.
COREWEBVIEW2_MOVE_FOCUS_REASON_NEXT Specifies that the focus is moving due to Tab traversal forward.
COREWEBVIEW2_MOVE_FOCUS_REASON_PREVIOUS Specifies that the focus is moving due to Tab traversal backward.

Specifies the reason for moving focus.

COREWEBVIEW2_PDF_TOOLBAR_ITEMS

enum COREWEBVIEW2_PDF_TOOLBAR_ITEMS

Values Descriptions
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_NONE No item.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_SAVE The save button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_PRINT The print button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_SAVE_AS The save as button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_ZOOM_IN The zoom in button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_ZOOM_OUT The zoom out button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_ROTATE The rotate button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_FIT_PAGE The fit page button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_PAGE_LAYOUT The page layout button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_BOOKMARKS The bookmarks button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_PAGE_SELECTOR The page select button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_SEARCH The search button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_FULL_SCREEN The full screen button.
COREWEBVIEW2_PDF_TOOLBAR_ITEMS_MORE_SETTINGS The more settings button.

Specifies the PDF toolbar item types used for the ICoreWebView2Settings::put_HiddenPdfToolbarItems method.

COREWEBVIEW2_PERMISSION_KIND

enum COREWEBVIEW2_PERMISSION_KIND

Values Descriptions
COREWEBVIEW2_PERMISSION_KIND_UNKNOWN_PERMISSION Indicates an unknown permission.
COREWEBVIEW2_PERMISSION_KIND_MICROPHONE Indicates permission to capture audio.
COREWEBVIEW2_PERMISSION_KIND_CAMERA Indicates permission to capture video.
COREWEBVIEW2_PERMISSION_KIND_GEOLOCATION Indicates permission to access geolocation.
COREWEBVIEW2_PERMISSION_KIND_NOTIFICATIONS Indicates permission to send web notifications.
COREWEBVIEW2_PERMISSION_KIND_OTHER_SENSORS Indicates permission to access generic sensor.
COREWEBVIEW2_PERMISSION_KIND_CLIPBOARD_READ Indicates permission to read the system clipboard without a user gesture.
COREWEBVIEW2_PERMISSION_KIND_MULTIPLE_AUTOMATIC_DOWNLOADS Indicates permission to automatically download multiple files.
COREWEBVIEW2_PERMISSION_KIND_FILE_READ_WRITE Indicates permission to read and write to files or folders on the device.
COREWEBVIEW2_PERMISSION_KIND_AUTOPLAY Indicates permission to play audio and video automatically on sites.
COREWEBVIEW2_PERMISSION_KIND_LOCAL_FONTS Indicates permission to use fonts on the device.
COREWEBVIEW2_PERMISSION_KIND_MIDI_SYSTEM_EXCLUSIVE_MESSAGE_ACCESS Indicates permission to send and receive system exclusive messages to/from MIDI (Musical Instrument Digital Interface) devices.

Indicates the type of a permission request.

COREWEBVIEW2_PERMISSION_STATE

enum COREWEBVIEW2_PERMISSION_STATE

Values Descriptions
COREWEBVIEW2_PERMISSION_STATE_DEFAULT Specifies that the default browser behavior is used, which normally prompt users for decision.
COREWEBVIEW2_PERMISSION_STATE_ALLOW Specifies that the permission request is granted.
COREWEBVIEW2_PERMISSION_STATE_DENY Specifies that the permission request is denied.

Specifies the response to a permission request.

COREWEBVIEW2_POINTER_EVENT_KIND

enum COREWEBVIEW2_POINTER_EVENT_KIND

Values Descriptions
COREWEBVIEW2_POINTER_EVENT_KIND_ACTIVATE Corresponds to WM_POINTERACTIVATE.
COREWEBVIEW2_POINTER_EVENT_KIND_DOWN Corresponds to WM_POINTERDOWN.
COREWEBVIEW2_POINTER_EVENT_KIND_ENTER Corresponds to WM_POINTERENTER.
COREWEBVIEW2_POINTER_EVENT_KIND_LEAVE Corresponds to WM_POINTERLEAVE.
COREWEBVIEW2_POINTER_EVENT_KIND_UP Corresponds to WM_POINTERUP.
COREWEBVIEW2_POINTER_EVENT_KIND_UPDATE Corresponds to WM_POINTERUPDATE.

Pointer event type used by SendPointerInput to convey the type of pointer event being sent to WebView.

The values of this enum align with the matching WM_POINTER* window messages.

COREWEBVIEW2_PREFERRED_COLOR_SCHEME

enum COREWEBVIEW2_PREFERRED_COLOR_SCHEME

Values Descriptions
COREWEBVIEW2_PREFERRED_COLOR_SCHEME_AUTO Auto color scheme.
COREWEBVIEW2_PREFERRED_COLOR_SCHEME_LIGHT Light color scheme.
COREWEBVIEW2_PREFERRED_COLOR_SCHEME_DARK Dark color scheme.

An enum to represent the options for WebView2 color scheme: auto, light, or dark.

COREWEBVIEW2_PRINT_COLLATION

enum COREWEBVIEW2_PRINT_COLLATION

Values Descriptions
COREWEBVIEW2_PRINT_COLLATION_DEFAULT The default collation for a printer.
COREWEBVIEW2_PRINT_COLLATION_COLLATED Indicate that the collation has been selected for the printed output.
COREWEBVIEW2_PRINT_COLLATION_UNCOLLATED Indicate that the collation has not been selected for the printed output.

Specifies the collation for a print.

COREWEBVIEW2_PRINT_COLOR_MODE

enum COREWEBVIEW2_PRINT_COLOR_MODE

Values Descriptions
COREWEBVIEW2_PRINT_COLOR_MODE_DEFAULT The default color mode for a printer.
COREWEBVIEW2_PRINT_COLOR_MODE_COLOR Indicate that the printed output will be in color.
COREWEBVIEW2_PRINT_COLOR_MODE_GRAYSCALE Indicate that the printed output will be in shades of gray.

Specifies the color mode for a print.

COREWEBVIEW2_PRINT_DIALOG_KIND

enum COREWEBVIEW2_PRINT_DIALOG_KIND

Values Descriptions
COREWEBVIEW2_PRINT_DIALOG_KIND_BROWSER Opens the browser print preview dialog.
COREWEBVIEW2_PRINT_DIALOG_KIND_SYSTEM Opens the system print dialog.

Specifies the print dialog kind.

COREWEBVIEW2_PRINT_DUPLEX

enum COREWEBVIEW2_PRINT_DUPLEX

Values Descriptions
COREWEBVIEW2_PRINT_DUPLEX_DEFAULT The default duplex for a printer.
COREWEBVIEW2_PRINT_DUPLEX_ONE_SIDED Print on only one side of the sheet.
COREWEBVIEW2_PRINT_DUPLEX_TWO_SIDED_LONG_EDGE Print on both sides of the sheet, flipped along the long edge.
COREWEBVIEW2_PRINT_DUPLEX_TWO_SIDED_SHORT_EDGE Print on both sides of the sheet, flipped along the short edge.

Specifies the duplex option for a print.

COREWEBVIEW2_PRINT_MEDIA_SIZE

enum COREWEBVIEW2_PRINT_MEDIA_SIZE

Values Descriptions
COREWEBVIEW2_PRINT_MEDIA_SIZE_DEFAULT The default media size for a printer.
COREWEBVIEW2_PRINT_MEDIA_SIZE_CUSTOM Indicate custom media size that is specific to the printer.

Specifies the media size for a print.

COREWEBVIEW2_PRINT_ORIENTATION

enum COREWEBVIEW2_PRINT_ORIENTATION

Values Descriptions
COREWEBVIEW2_PRINT_ORIENTATION_PORTRAIT Print the page(s) in portrait orientation.
COREWEBVIEW2_PRINT_ORIENTATION_LANDSCAPE Print the page(s) in landscape orientation.

The orientation for printing, used by the Orientation property on ICoreWebView2PrintSettings.

Currently only printing to PDF is supported.

COREWEBVIEW2_PRINT_STATUS

enum COREWEBVIEW2_PRINT_STATUS

Values Descriptions
COREWEBVIEW2_PRINT_STATUS_SUCCEEDED Indicates that the print operation is succeeded.
COREWEBVIEW2_PRINT_STATUS_PRINTER_UNAVAILABLE Indicates that the printer is not available.
COREWEBVIEW2_PRINT_STATUS_OTHER_ERROR Indicates that the print operation is failed.

Indicates the status for printing.

COREWEBVIEW2_PROCESS_FAILED_KIND

enum COREWEBVIEW2_PROCESS_FAILED_KIND

Values Descriptions
COREWEBVIEW2_PROCESS_FAILED_KIND_BROWSER_PROCESS_EXITED Indicates that the browser process ended unexpectedly.
COREWEBVIEW2_PROCESS_FAILED_KIND_RENDER_PROCESS_EXITED Indicates that the main frame's render process ended unexpectedly.
COREWEBVIEW2_PROCESS_FAILED_KIND_RENDER_PROCESS_UNRESPONSIVE Indicates that the main frame's render process is unresponsive.
COREWEBVIEW2_PROCESS_FAILED_KIND_FRAME_RENDER_PROCESS_EXITED Indicates that a frame-only render process ended unexpectedly.
COREWEBVIEW2_PROCESS_FAILED_KIND_UTILITY_PROCESS_EXITED Indicates that a utility process ended unexpectedly.
COREWEBVIEW2_PROCESS_FAILED_KIND_SANDBOX_HELPER_PROCESS_EXITED Indicates that a sandbox helper process ended unexpectedly.
COREWEBVIEW2_PROCESS_FAILED_KIND_GPU_PROCESS_EXITED Indicates that the GPU process ended unexpectedly.
COREWEBVIEW2_PROCESS_FAILED_KIND_PPAPI_PLUGIN_PROCESS_EXITED Indicates that a PPAPI plugin process ended unexpectedly.
COREWEBVIEW2_PROCESS_FAILED_KIND_PPAPI_BROKER_PROCESS_EXITED Indicates that a PPAPI plugin broker process ended unexpectedly.
COREWEBVIEW2_PROCESS_FAILED_KIND_UNKNOWN_PROCESS_EXITED Indicates that a process of unspecified kind ended unexpectedly.

Specifies the process failure type used in the ICoreWebView2ProcessFailedEventHandler interface.

The values in this enum make reference to the process kinds in the Chromium architecture. For more information about what these processes are and what they do, see Browser Architecture - Inside look at modern web browser.

COREWEBVIEW2_PROCESS_FAILED_REASON

enum COREWEBVIEW2_PROCESS_FAILED_REASON

Values Descriptions
COREWEBVIEW2_PROCESS_FAILED_REASON_UNEXPECTED An unexpected process failure occurred.
COREWEBVIEW2_PROCESS_FAILED_REASON_UNRESPONSIVE The process became unresponsive.
COREWEBVIEW2_PROCESS_FAILED_REASON_TERMINATED The process was terminated. For example, from Task Manager.
COREWEBVIEW2_PROCESS_FAILED_REASON_CRASHED The process crashed.
COREWEBVIEW2_PROCESS_FAILED_REASON_LAUNCH_FAILED The process failed to launch.
COREWEBVIEW2_PROCESS_FAILED_REASON_OUT_OF_MEMORY The process died due to running out of memory.
COREWEBVIEW2_PROCESS_FAILED_REASON_PROFILE_DELETED The process exited because its corresponding profile was deleted.

Specifies the process failure reason used in the ICoreWebView2ProcessFailedEventHandler interface.

COREWEBVIEW2_PROCESS_KIND

enum COREWEBVIEW2_PROCESS_KIND

Values Descriptions
COREWEBVIEW2_PROCESS_KIND_BROWSER Indicates the browser process kind.
COREWEBVIEW2_PROCESS_KIND_RENDERER Indicates the render process kind.
COREWEBVIEW2_PROCESS_KIND_UTILITY Indicates the utility process kind.
COREWEBVIEW2_PROCESS_KIND_SANDBOX_HELPER Indicates the sandbox helper process kind.
COREWEBVIEW2_PROCESS_KIND_GPU Indicates the GPU process kind.
COREWEBVIEW2_PROCESS_KIND_PPAPI_PLUGIN Indicates the PPAPI plugin process kind.
COREWEBVIEW2_PROCESS_KIND_PPAPI_BROKER Indicates the PPAPI plugin broker process kind.

Indicates the process type used in the ICoreWebView2ProcessInfo interface.

COREWEBVIEW2_SCRIPT_DIALOG_KIND

enum COREWEBVIEW2_SCRIPT_DIALOG_KIND

Values Descriptions
COREWEBVIEW2_SCRIPT_DIALOG_KIND_ALERT Indicates that the dialog uses the window.alert JavaScript function.
COREWEBVIEW2_SCRIPT_DIALOG_KIND_CONFIRM Indicates that the dialog uses the window.confirm JavaScript function.
COREWEBVIEW2_SCRIPT_DIALOG_KIND_PROMPT Indicates that the dialog uses the window.prompt JavaScript function.
COREWEBVIEW2_SCRIPT_DIALOG_KIND_BEFOREUNLOAD Indicates that the dialog uses the beforeunload JavaScript event.

Specifies the JavaScript dialog type used in the ICoreWebView2ScriptDialogOpeningEventHandler interface.

COREWEBVIEW2_SERVER_CERTIFICATE_ERROR_ACTION

enum COREWEBVIEW2_SERVER_CERTIFICATE_ERROR_ACTION

Values Descriptions
COREWEBVIEW2_SERVER_CERTIFICATE_ERROR_ACTION_ALWAYS_ALLOW Indicates to ignore the warning and continue the request with the TLS certificate.
COREWEBVIEW2_SERVER_CERTIFICATE_ERROR_ACTION_CANCEL Indicates to reject the certificate and cancel the request.
COREWEBVIEW2_SERVER_CERTIFICATE_ERROR_ACTION_DEFAULT Indicates to display the default TLS interstitial error page to user for page navigations.

Specifies the action type when server certificate error is detected to be used in the ICoreWebView2ServerCertificateErrorDetectedEventArgs interface.

COREWEBVIEW2_TRACKING_PREVENTION_LEVEL

enum COREWEBVIEW2_TRACKING_PREVENTION_LEVEL

Values Descriptions
COREWEBVIEW2_TRACKING_PREVENTION_LEVEL_NONE Tracking prevention is turned off.
COREWEBVIEW2_TRACKING_PREVENTION_LEVEL_BASIC The least restrictive level of tracking prevention.
COREWEBVIEW2_TRACKING_PREVENTION_LEVEL_BALANCED The default level of tracking prevention.
COREWEBVIEW2_TRACKING_PREVENTION_LEVEL_STRICT The most restrictive level of tracking prevention.

Tracking prevention levels.

COREWEBVIEW2_WEB_ERROR_STATUS

enum COREWEBVIEW2_WEB_ERROR_STATUS

Values Descriptions
COREWEBVIEW2_WEB_ERROR_STATUS_UNKNOWN Indicates that an unknown error occurred.
COREWEBVIEW2_WEB_ERROR_STATUS_CERTIFICATE_COMMON_NAME_IS_INCORRECT Indicates that the SSL certificate common name does not match the web address.
COREWEBVIEW2_WEB_ERROR_STATUS_CERTIFICATE_EXPIRED Indicates that the SSL certificate has expired.
COREWEBVIEW2_WEB_ERROR_STATUS_CLIENT_CERTIFICATE_CONTAINS_ERRORS Indicates that the SSL client certificate contains errors.
COREWEBVIEW2_WEB_ERROR_STATUS_CERTIFICATE_REVOKED Indicates that the SSL certificate has been revoked.
COREWEBVIEW2_WEB_ERROR_STATUS_CERTIFICATE_IS_INVALID Indicates that the SSL certificate is not valid.
COREWEBVIEW2_WEB_ERROR_STATUS_SERVER_UNREACHABLE Indicates that the host is unreachable.
COREWEBVIEW2_WEB_ERROR_STATUS_TIMEOUT Indicates that the connection has timed out.
COREWEBVIEW2_WEB_ERROR_STATUS_ERROR_HTTP_INVALID_SERVER_RESPONSE Indicates that the server returned an invalid or unrecognized response.
COREWEBVIEW2_WEB_ERROR_STATUS_CONNECTION_ABORTED Indicates that the connection was stopped.
COREWEBVIEW2_WEB_ERROR_STATUS_CONNECTION_RESET Indicates that the connection was reset.
COREWEBVIEW2_WEB_ERROR_STATUS_DISCONNECTED Indicates that the Internet connection has been lost.
COREWEBVIEW2_WEB_ERROR_STATUS_CANNOT_CONNECT Indicates that a connection to the destination was not established.
COREWEBVIEW2_WEB_ERROR_STATUS_HOST_NAME_NOT_RESOLVED Indicates that the provided host name was not able to be resolved.
COREWEBVIEW2_WEB_ERROR_STATUS_OPERATION_CANCELED Indicates that the operation was canceled.
COREWEBVIEW2_WEB_ERROR_STATUS_REDIRECT_FAILED Indicates that the request redirect failed.
COREWEBVIEW2_WEB_ERROR_STATUS_UNEXPECTED_ERROR Indicates that an unexpected error occurred.
COREWEBVIEW2_WEB_ERROR_STATUS_VALID_AUTHENTICATION_CREDENTIALS_REQUIRED Indicates that user is prompted with a login, waiting on user action.
COREWEBVIEW2_WEB_ERROR_STATUS_VALID_PROXY_AUTHENTICATION_REQUIRED Indicates that user lacks proper authentication credentials for a proxy server.

Indicates the error status values for web navigations.

COREWEBVIEW2_WEB_RESOURCE_CONTEXT

enum COREWEBVIEW2_WEB_RESOURCE_CONTEXT

Values Descriptions
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_ALL Specifies all resources.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_DOCUMENT Specifies a document resource.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_STYLESHEET Specifies a CSS resource.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_IMAGE Specifies an image resource.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_MEDIA Specifies another media resource such as a video.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_FONT Specifies a font resource.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_SCRIPT Specifies a script resource.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_XML_HTTP_REQUEST Specifies an XML HTTP request.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_FETCH Specifies a Fetch API communication.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_TEXT_TRACK Specifies a TextTrack resource.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_EVENT_SOURCE Specifies an EventSource API communication.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_WEBSOCKET Specifies a WebSocket API communication.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_MANIFEST Specifies a Web App Manifest.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_SIGNED_EXCHANGE Specifies a Signed HTTP Exchange.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_PING Specifies a Ping request.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_CSP_VIOLATION_REPORT Specifies a CSP Violation Report.
COREWEBVIEW2_WEB_RESOURCE_CONTEXT_OTHER Specifies an other resource.

Specifies the web resource request contexts.

COREWEBVIEW2_COLOR

A value representing RGBA color (Red, Green, Blue, Alpha) for WebView2.

typedef COREWEBVIEW2_COLOR

Each component takes a value from 0 to 255, with 0 being no intensity and 255 being the highest intensity.

CompareBrowserVersions

public STDAPI CompareBrowserVersions(PCWSTR version1, PCWSTR version2, int * result)

This method is for anyone want to compare version correctly to determine which version is newer, older or same.

Use it to determine whether to use webview2 or certain feature based upon version. Sets the value of result to -1, 0 or 1 if version1 is less than, equal or greater than version2 respectively. Returns E_INVALIDARG if it fails to parse any of the version strings or any input parameter is null. Directly use the versionInfo obtained from GetAvailableCoreWebView2BrowserVersionString with input, channel information is ignored.

CreateCoreWebView2Environment

public STDAPI CreateCoreWebView2Environment(ICoreWebView2CreateCoreWebView2EnvironmentCompletedHandler * environmentCreatedHandler)

Creates an evergreen WebView2 Environment using the installed WebView2 Runtime version.

This is equivalent to running CreateCoreWebView2EnvironmentWithOptions with nullptr for browserExecutableFolder, userDataFolder, additionalBrowserArguments. For more information, navigate to CreateCoreWebView2EnvironmentWithOptions.

CreateCoreWebView2EnvironmentWithOptions

public STDAPI CreateCoreWebView2EnvironmentWithOptions(PCWSTR browserExecutableFolder, PCWSTR userDataFolder, ICoreWebView2EnvironmentOptions * environmentOptions, ICoreWebView2CreateCoreWebView2EnvironmentCompletedHandler * environmentCreatedHandler)

DLL export to create a WebView2 environment with a custom version of WebView2 Runtime, user data folder, and with or without additional options.

When WebView2 experimental APIs are used, make sure to provide a valid environmentOptions so that WebView2 runtime knows which version of the SDK that the app is using. Otherwise, WebView2 runtime assumes that the version of the SDK being used is the latest version known to it, which might not be the version of the SDK being used. This wrong SDK version assumption could result in some experimental APIs not being available.

The WebView2 environment and all other WebView2 objects are single threaded and have dependencies on Windows components that require COM to be initialized for a single-threaded apartment. The app is expected to run CoInitializeEx before running CreateCoreWebView2EnvironmentWithOptions.

CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);

If CoInitializeEx did not run or previously ran with COINIT_MULTITHREADED, CreateCoreWebView2EnvironmentWithOptions fails with one of the following errors.

CO_E_NOTINITIALIZED -  if CoInitializeEx was not called
RPC_E_CHANGED_MODE  -  if CoInitializeEx was previously called with
                       COINIT_MULTITHREADED

Use browserExecutableFolder to specify whether WebView2 controls use a fixed or installed version of the WebView2 Runtime that exists on a user machine. To use a fixed version of the WebView2 Runtime, pass the folder path that contains the fixed version of the WebView2 Runtime to browserExecutableFolder. BrowserExecutableFolder supports both relative (to the application's executable) and absolute files paths. To create WebView2 controls that use the installed version of the WebView2 Runtime that exists on user machines, pass a null or empty string to browserExecutableFolder. In this scenario, the API tries to find a compatible version of the WebView2 Runtime that is installed on the user machine (first at the machine level, and then per user) using the selected channel preference. The path of fixed version of the WebView2 Runtime should not contain \Edge\Application\. When such a path is used, the API fails with HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED).

The default channel search order is the WebView2 Runtime, Beta, Dev, and Canary. When an override WEBVIEW2_RELEASE_CHANNEL_PREFERENCE environment variable or applicable releaseChannelPreference registry value is set to 1, the channel search order is reversed.

You may specify the userDataFolder to change the default user data folder location for WebView2. The path is either an absolute file path or a relative file path that is interpreted as relative to the compiled code for the current process. For UWP apps, the default user data folder is the app data folder for the package. For non-UWP apps, the default user data ({Executable File Name}.WebView2) folder is created in the same directory next to the compiled code for the app. WebView2 creation fails if the compiled code is running in a directory in which the process does not have permission to create a new directory. The app is responsible to clean up the associated user data folder when it is done.

Note

As a browser process may be shared among WebViews, WebView creation fails with HRESULT_FROM_WIN32(ERROR_INVALID_STATE) if the specified options does not match the options of the WebViews that are currently running in the shared browser process.

environmentCreatedHandler is the handler result to the async operation that contains the WebView2Environment that was created.

The browserExecutableFolder, userDataFolder and additionalBrowserArguments of the environmentOptions may be overridden by values either specified in environment variables or in the registry.

When creating a WebView2Environment the following environment variables are verified.

WEBVIEW2_BROWSER_EXECUTABLE_FOLDER
WEBVIEW2_USER_DATA_FOLDER
WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS
WEBVIEW2_RELEASE_CHANNEL_PREFERENCE

If you find an override environment variable, use the browserExecutableFolder and userDataFolder values as replacements for the corresponding values in CreateCoreWebView2EnvironmentWithOptions parameters. If additionalBrowserArguments is specified in environment variable or in the registry, it is appended to the corresponding values in CreateCoreWebView2EnvironmentWithOptions parameters.

While not strictly overrides, additional environment variables may be set.

WEBVIEW2_WAIT_FOR_SCRIPT_DEBUGGER

When found with a non-empty value, this indicates that the WebView is being launched under a script debugger. In this case, the WebView issues a Page.waitForDebugger CDP command that runs the script inside the WebView to pause on launch, until a debugger issues a corresponding Runtime.runIfWaitingForDebugger CDP command to resume the runtime.

Note

The following environment variable does not have a registry key equivalent: WEBVIEW2_WAIT_FOR_SCRIPT_DEBUGGER.

When found with a non-empty value, it indicates that the WebView is being launched under a script debugger that also supports host apps that use multiple WebViews. The value is used as the identifier for a named pipe that is opened and written to when a new WebView is created by the host app. The payload should match the payload of the remote-debugging-port JSON target and an external debugger may use it to attach to a specific WebView instance. The format of the pipe created by the debugger should be \\.\pipe\WebView2\Debugger\{app_name}\{pipe_name}, where the following are true.

  • {app_name} is the host app exe file name, for example, WebView2Example.exe

  • {pipe_name} is the value set for WEBVIEW2_PIPE_FOR_SCRIPT_DEBUGGER

To enable debugging of the targets identified by the JSON, you must set the WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS environment variable to send --remote-debugging-port={port_num}, where the following is true.

  • {port_num} is the port on which the CDP server binds.

Warning

If you set both WEBVIEW2_PIPE_FOR_SCRIPT_DEBUGGER and WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS environment variables, the WebViews hosted in your app and associated contents may exposed to 3rd party apps such as debuggers.

Note

The following environment variable does not have a registry key equivalent: WEBVIEW2_PIPE_FOR_SCRIPT_DEBUGGER.

If none of those environment variables exist, then the registry is examined next. The following registry values are verified.

[{Root}]\Software\Policies\Microsoft\Edge\WebView2\BrowserExecutableFolder
"{AppId}"=""

[{Root}]\Software\Policies\Microsoft\Edge\WebView2\ReleaseChannelPreference
"{AppId}"=""

[{Root}]\Software\Policies\Microsoft\Edge\WebView2\AdditionalBrowserArguments
"{AppId}"=""

[{Root}]\Software\Policies\Microsoft\Edge\WebView2\UserDataFolder
"{AppId}"=""

Use a group policy under Administrative Templates > Microsoft Edge WebView2 to configure browserExecutableFolder and releaseChannelPreference.

In the unlikely scenario where some instances of WebView are open during a browser update, the deletion of the previous WebView2 Runtime may be blocked. To avoid running out of disk space, a new WebView creation fails with HRESULT_FROM_WIN32(ERROR_DISK_FULL) if it detects that too many previous WebView2 Runtime versions exist.

The default maximum number of WebView2 Runtime versions allowed is 20. To override the maximum number of the previous WebView2 Runtime versions allowed, set the value of the following environment variable.

COREWEBVIEW2_MAX_INSTANCES

If the Webview depends upon an installed WebView2 Runtime version and it is uninstalled, any subsequent creation fails with HRESULT_FROM_WIN32(ERROR_PRODUCT_UNINSTALLED).

First verify with Root as HKLM and then HKCU. AppId is first set to the Application User Model ID of the process, then if no corresponding registry key, the AppId is set to the compiled code name of the process, or if that is not a registry key then *. If an override registry key is found, use the browserExecutableFolder and userDataFolder registry values as replacements and append additionalBrowserArguments registry values for the corresponding values in CreateCoreWebView2EnvironmentWithOptions parameters.

The following summarizes the possible error values that can be returned from CreateCoreWebView2EnvironmentWithOptions and a description of why these errors occur.

Error value Description
CO_E_NOTINITIALIZED CoInitializeEx was not called.
RPC_E_CHANGED_MODE CoInitializeEx was previously called with COINIT_MULTITHREADED.
HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED) \Edge\Application path used in browserExecutableFolder.
HRESULT_FROM_WIN32(ERROR_INVALID_STATE) Specified options do not match the options of the WebViews that are currently running in the shared browser process.
HRESULT_FROM_WIN32(ERROR_DISK_FULL) In the unlikely scenario where some instances of WebView are open during a browser update, the deletion of the previous WebView2 Runtime may be blocked. To avoid running out of disk space, a new WebView creation fails with HRESULT_FROM_WIN32(ERROR_DISK_FULL) if it detects that too many previous WebView2 Runtime versions exist.
HRESULT_FROM_WIN32(ERROR_PRODUCT_UNINSTALLED) If the Webview depends upon an installed WebView2 Runtime version and it is uninstalled.
HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) Could not find Edge installation.
HRESULT_FROM_WIN32(ERROR_FILE_EXISTS) User data folder cannot be created because a file with the same name already exists.
E_ACCESSDENIED Unable to create user data folder, Access Denied.
E_FAIL Edge runtime unable to start.

GetAvailableCoreWebView2BrowserVersionString

public STDAPI GetAvailableCoreWebView2BrowserVersionString(PCWSTR browserExecutableFolder, LPWSTR * versionInfo)

Get the browser version info including channel name if it is not the WebView2 Runtime.

Channel names are Beta, Dev, and Canary. If an override exists for the browserExecutableFolder or the channel preference, the override is used. If an override is not specified, then the parameter value passed to GetAvailableCoreWebView2BrowserVersionString is used.

The caller must free the returned string with CoTaskMemFree. See API Conventions.