SHGetFileInfo (Windows CE 5.0)

Artikel
09/14/2012

This function retrieves information about an object in the file system, such as a file, a folder, a directory, or a drive root.

Syntax

WINSHELLAPI DWORD WINAPI SHGetFileInfo(  LPCTSTRpszPath,   DWORDdwFileAttributes,   SHFILEINFO FAR* psfi,   UINTcbFileInfo,   UINTuFlags );

Parameters

pszPath
[in] Pointer to a buffer that contains the path and file name. Both absolute and relative paths are valid. The pszPath string can use either short (the 8.3 form) or long file names. For more information, see Remarks.

dwFileAttributes
[in] Combination of one or more file attribute flags (FILE_ATTRIBUTE_* values). If uFlags does not include the SHGFI_USEFILEATTRIBUTES flag, this parameter is ignored.

The following table shows the additional values supported by Windows CE.

Value	Description
FILE_ATTRIBUTE_INROM	The file is an operating system (OS) file stored in ROM. These files are read-only.
FILE_ATTRIBUTE_ROMMODULE	The file is an operating system file stored in ROM, designed to execute in place. In other words, code from this file is executed directly from ROM, rather than being first copied to RAM. The CreateFile function cannot be used to access this file. Use the LoadLibrary and CreateProcess functions instead.

psfi
[in] Pointer to a SHFILEINFO structure to receive the file information.
cbFileInfo
[in] Size, in bytes, of the SHFILEINFO structure pointed to by the psfi parameter.

uFlags
[in] Flags that specify the file information to retrieve. It can be a combination of the values in the following table.

Value	Description
SHGFI_ATTRIBUTES	Retrieves the item attributes. The attributes are copied to the dwAttributes member of the structure specified in the psfi parameter. These are the same attributes that are obtained from IShellFolder::GetAttributesOf.
SHGFI_DISPLAYNAME	Retrieves the display name for the file. The name is copied to the szDisplayName member of the structure specified in psfi. The returned display name uses the long file name, if there is one, rather than the 8.3 form of the file name.
SHGFI_EXETYPE	Retrieves the type of the executable file if pszPath identifies an executable file. This flag cannot be specified with any other flags.
SHGFI_ICON	Retrieves the handle to the icon that represents the file and the index of the icon within the system image list. The handle is copied to the hIcon member of the structure specified by psfi, and the index is copied to the iIcon member. The return value is the handle to the system image list. You must call the DestroyIcon function on this icon handle.
SHGFI_ICONLOCATION	Retrieves the name of the file that contains the icon representing the file. The name is copied to the szDisplayName member of the structure specified in psfi.
SHGFI_LARGEICON	Modifies SHGFI_ICON, causing the function to retrieve the file's large icon.
SHGFI_LINKOVERLAY	Modifies SHGFI_ICON, causing the function to add the link overlay to the file's icon.
SHGFI_OPENICON	Modifies SHGFI_ICON, causing the function to retrieve the file's open icon. A container object displays an open icon to indicate that the container is open.
SHGFI_PIDL	For Windows CE 1.0 through 2.01 and for Microsoft® Windows® CE Handheld PC Edition version 3.0 and Microsoft® Windows® CE Handheld PC Professional Edition version 3.0, indicates that pszPath is the address of an ITEMIDLIST structure rather than a path name.
SHGFI_SELECTED	Modifies SHGFI_ICON, causing the function to blend the file's icon with the system highlight color.
SHGFI_SELECTICON	Modifies SHGFI_ICON, causing the function to retrieve the file's icon in the selected state. If SHGetFileInfo function cannot find a registered select icon for a file when SHGFI_SELECTICON was requested, it will return the default icon. Note This flag is supported only for a Windows Mobile-based device.
SHGFI_SHELLICONSIZE	Modifies SHGFI_ICON, causing the function to retrieve a shell-sized icon. If this flag is not specified the function sizes the icon according to the system metric values. Note This flag is not supported for a Windows Mobile-based device.
SHGFI_SMALLICON	Modifies SHGFI_ICON, causing the function to retrieve the file's small icon.
SHGFI_SYSICONINDEX	Retrieves the index of the icon within the system image list. The index is copied to the iIcon member of the structure specified by psfi. The return value is the handle to the system image list.
SHGFI_TYPENAME	Retrieves the string that describes the file's type. The string is copied to the szTypeName member of the structure specified in psfi.
SHGFI_USEFILEATTRIBUTES	Indicates that the function should not attempt to access the file specified by pszPath. Rather, it should act as if the file specified by pszPath exists with the file attributes passed in dwFileAttributes. This flag cannot be combined with the SHGFI_ATTRIBUTES, SHGFI_EXETYPE, or SHGFI_PIDL flags.

Return Values

Returns a value with a meaning that depends on the uFlags parameter. If uFlags contains the SHGFI_EXETYPE flag, the return value specifies the type of the executable file. The following table shows the possible values.

Value	Executable File Type
0	Non-executable file or an error condition
Low-order word = NE or PE and high-order word = 3.0, 3.5, or 4.0	Windows application
Low-order word = MZ and high-order word = 0	MS-DOS .exe, .com, or .bat file
Low-order word = PE and high-order word = 0	Microsoft Win32®-based console application

If uFlags contains SHGFI_SYSICONINDEX, the return value is the handle to the system image list that contains the large icon images. If SHGFI_SMALLICON is included with SHGFI_SYSICONINDEX, the return value is the handle to the image list that contains the small icon images.

If uFlags does not contain SHGFI_EXETYPE or SHGFI_SYSICONINDEX, the return value is nonzero if successful, or zero otherwise.

Remarks

If the uFlags parameter includes the SHGFI_PIDL flag, the pszPath parameter must be a pointer to an ITEMIDLIST (PIDL) structure that contains the list of item identifiers that uniquely identifies the file within the shell's namespace. The PIDL must be a fully qualified PIDL. Relative PIDLs are not allowed.

If the uFlags parameter includes the SHGFI_USEFILEATTRIBUTES flag, the pszPath parameter does not have to be a valid file name. The function proceeds as if the file exists with the specified name and with the file attributes passed in the dwFileAttributes parameter. This enables you to obtain information about a file type by passing just the extension for pszPath and passing FILE_ATTRIBUTE_NORMAL in dwFileAttributes.

For Windows CE 2.10 and later, SHGetFileInfo does not support the following values for uFlags:

SHGFI_EXETYPE
SHGFI_ICONLOCATION
SHGFI_LINKOVERLAY
SHGFI_OPENICON
SHGFI_SELECTED
SHGFI_SHELLICONSIZE

Also for Windows CE 2.10 and later, SHGetFileInfo supports the SHGFI_PIDL flag only for Microsoft® Windows® CE Handheld PC Edition version 3.0 and Microsoft® Windows® CE Handheld PC Professional Edition version 3.0.

Code Example

The following code example demonstrates how to to enable two-state filesytem icon animation.

Note To make the following code example easier to read, security checking and error handling are not included. This code example should not be used in a release configuration unless it has been modified to include them.

LRESULT CALLBACK TwoStateFileAnimProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{

    LPCTSTR szFileName                    = TEXT("myfile.xls");
    LRESULT lRet                          = 0;
    static SHFILEINFO s_sfiLarge          = {0};
    static SHFILEINFO s_sfiLargeSelected  = {0};
    static HIMAGELIST s_himlLarge         = NULL;
    static HIMAGELIST s_himlLargeSelected = NULL;

    switch (message)
    {
        case WM_CREATE:
            // Cache the file information and the imagelist.
            // Get the large default icon for the file.
            s_himlLarge = (HIMAGELIST)SHGetFileInfo(szFileName, 0, &s_sfiLarge, sizeof(s_sfiLarge), SHGFI_SYSICONINDEX|SHGFI_LARGEICON);

            // Get the large selected icon for the file.
            s_himlLargeSelected = (HIMAGELIST)SHGetFileInfo(szFileName, 0, &s_sfiLargeSelected, sizeof(s_sfiLargeSelected), SHGFI_SYSICONINDEX|SHGFI_LARGEICON|SHGFI_SELECTICON);
            break;

        case WM_PAINT:
            {
                PAINTSTRUCT ps;
                HDC hdc = BeginPaint(hwnd, &ps);

                // Draw the file icon in the selected state.
                ImageList_Draw(s_himlLargeSelected, s_sfiLargeSelected.iIcon, hdc, 0, 0, ILD_TRANSPARENT);

                // Draw the file icon in the default state.
                ImageList_Draw(s_himlLarge, s_sfiLarge.iIcon, hdc, 0, 100, ILD_TRANSPARENT);
                EndPaint(hwnd, &ps);
                break;
            }

    }

    return lRet;

}

Requirements

OS Versions: Windows CE 1.0 and later.
Header: Shellapi.h.

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