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COlePropertyPage Class

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Used to display the properties of a custom control in a graphical interface, similar to a dialog box.

Syntax

class AFX_NOVTABLE COlePropertyPage : public CDialog

Members

Public Constructors

Name Description
COlePropertyPage::COlePropertyPage Constructs a COlePropertyPage object.

Public Methods

Name Description
COlePropertyPage::GetControlStatus Indicates whether the user has modified the value in the control.
COlePropertyPage::GetObjectArray Returns the array of objects being edited by the property page.
COlePropertyPage::GetPageSite Returns a pointer to the property page's IPropertyPageSite interface.
COlePropertyPage::IgnoreApply Determines which controls do not enable the Apply button.
COlePropertyPage::IsModified Indicates whether the user has modified the property page.
COlePropertyPage::OnEditProperty Called by the framework when the user edits a property.
COlePropertyPage::OnHelp Called by the framework when the user invokes help.
COlePropertyPage::OnInitDialog Called by the framework when the property page is initialized.
COlePropertyPage::OnObjectsChanged Called by the framework when another OLE control, with new properties, is chosen.
COlePropertyPage::OnSetPageSite Called by the framework when the property frame provides the page's site.
COlePropertyPage::SetControlStatus Sets a flag indicating whether the user has modified the value in the control.
COlePropertyPage::SetDialogResource Sets the property page's dialog resource.
COlePropertyPage::SetHelpInfo Sets the property page's brief help text, the name of its help file, and its help context.
COlePropertyPage::SetModifiedFlag Sets a flag indicating whether the user has modified the property page.
COlePropertyPage::SetPageName Sets the property page's name (caption).

Remarks

For instance, a property page may include an edit control that allows the user to view and modify the control's caption property.

Each custom or stock control property can have a dialog control that allows the control's user to view the current property value and modify that value if needed.

For more information on using COlePropertyPage, see the article ActiveX Controls: Property Pages.

Inheritance Hierarchy

CObject

CCmdTarget

CWnd

CDialog

COlePropertyPage

Requirements

Header: afxctl.h

COlePropertyPage::COlePropertyPage

Constructs a COlePropertyPage object.

COlePropertyPage(
    UINT idDlg,
    UINT idCaption);

Parameters

idDlg
Resource ID of the dialog template.

idCaption
Resource ID of the property page's caption.

Remarks

When you implement a subclass of COlePropertyPage, your subclass's constructor should use the COlePropertyPage constructor to identify the dialog-template resource on which the property page is based and the string resource containing its caption.

COlePropertyPage::GetControlStatus

Determines whether the user has modified the value of the property page control with the specified resource ID.

BOOL GetControlStatus(UINT nID);

Parameters

nID
Resource ID of a property page control.

Return Value

TRUE if the control value has been modified; otherwise FALSE.

COlePropertyPage::GetObjectArray

Returns the array of objects being edited by the property page.

LPDISPATCH* GetObjectArray(ULONG* pnObjects);

Parameters

pnObjects
Pointer to an unsigned long integer that will receive the number of objects being edited by the page.

Return Value

Pointer to an array of IDispatch pointers, which are used to access the properties of each control on the property page. The caller must not release these interface pointers.

Remarks

Each property page object maintains an array of pointers to the IDispatch interfaces of the objects being edited by the page. This function sets its pnObjects argument to the number of elements in that array and returns a pointer to the first element of the array.

COlePropertyPage::GetPageSite

Gets a pointer to the property page's IPropertyPageSite interface.

LPPROPERTYPAGESITE GetPageSite();

Return Value

A pointer to the property page's IPropertyPageSite interface.

Remarks

Controls and containers cooperate so that users can browse and edit control properties. The control provides property pages, each of which is an OLE object that allows the user to edit a related set of properties. The container provides a property frame that displays the property pages. For each page, the property frame provides a page site, which supports the IPropertyPageSite interface.

COlePropertyPage::IgnoreApply

Determines which controls do not enable the Apply button.

void IgnoreApply(UINT nID);

Parameters

nID
ID of the control to be ignored.

Remarks

The property page's Apply button is enabled only when values of property page controls have been changed. Use this function to specify controls that do not cause the Apply button to be enabled when their values change.

COlePropertyPage::IsModified

Determines whether the user has changed any values on the property page.

BOOL IsModified();

Return Value

TRUE if the property page has been modified.

COlePropertyPage::OnEditProperty

The framework calls this function when a specific property is to be edited.

virtual BOOL OnEditProperty(DISPID dispid);

Parameters

dispid
Dispatch ID of the property being edited.

Return Value

The default implementation returns FALSE. Overrides of this function should return TRUE.

Remarks

You can override it to set the focus to the appropriate control on the page. The default implementation does nothing and returns FALSE.

COlePropertyPage::OnHelp

The framework calls this function when the user requests online help.

virtual BOOL OnHelp(LPCTSTR lpszHelpDir);

Parameters

lpszHelpDir
Directory containing the property page's help file.

Return Value

The default implementation returns FALSE.

Remarks

Override it if your property page must perform any special action when the user accesses help. The default implementation does nothing and returns FALSE, which instructs the framework to call WinHelp.

COlePropertyPage::OnInitDialog

The framework calls this function when the property page's dialog is initialized.

virtual BOOL OnInitDialog();

Return Value

The default implementation returns FALSE.

Remarks

Override it if any special action is required when the dialog is initialized. The default implementation calls CDialog::OnInitDialog and returns FALSE.

COlePropertyPage::OnObjectsChanged

Called by the framework when another OLE control, with new properties, is chosen.

virtual void OnObjectsChanged();

Remarks

When viewing the properties of an OLE control in the developer environment, a modeless dialog box is used to display its property pages. If another control is selected, a different set of property pages must be displayed for the new set of properties. The framework calls this function to notify the property page of the change.

Override this function to receive notification of this action and perform any special actions.

COlePropertyPage::OnSetPageSite

The framework calls this function when the property frame provides the property page's page site.

virtual void OnSetPageSite();

Remarks

The default implementation loads the page's caption and attempts to determine the page's size from the dialog resource. Override this function if your property page requires any further action; your override should call the base-class implementation.

COlePropertyPage::SetControlStatus

Changes the status of a property page control.

BOOL SetControlStatus(
    UINT nID,
    BOOL bDirty);

Parameters

nID
Contains the ID of a property page control.

bDirty
Specifies if a field of the property page has been modified. Set to TRUE if the field has been modified, FALSE if it has not been modified.

Return Value

TRUE, if the specified control was set; otherwise FALSE.

Remarks

If the status of a property page control is dirty when the property page is closed or the Apply button is chosen, the control's property will be updated with the appropriate value.

COlePropertyPage::SetDialogResource

Sets the property page's dialog resource.

void SetDialogResource(HGLOBAL hDialog);

Parameters

hDialog
Handle to the property page's dialog resource.

COlePropertyPage::SetHelpInfo

Specifies tooltip information, the help filename, and the help context for your property page.

void SetHelpInfo(
    LPCTSTR lpszDocString,
    LPCTSTR lpszHelpFile = NULL,
    DWORD dwHelpContext = 0);

Parameters

lpszDocString
A string containing brief help information for display in a status bar or other location.

lpszHelpFile
Name of the property page's help file.

dwHelpContext
Help context for the property page.

COlePropertyPage::SetModifiedFlag

Indicates whether the user has modified the property page.

void SetModifiedFlag(BOOL bModified = TRUE);

Parameters

bModified
Specifies the new value for the property page's modified flag.

COlePropertyPage::SetPageName

Sets the property page's name, which the property frame will typically display on the page's tab.

void SetPageName(LPCTSTR lpszPageName);

Parameters

lpszPageName
Pointer to a string containing the property page's name.

See also

MFC Sample CIRC3
MFC Sample TESTHELP
CDialog Class
Hierarchy Chart
CDialog Class