PropSheetPageProc


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PropSheetPageProc
UINT CALLBACK PropSheetPageProc(
    HWND hwnd,		
    UINT uMsg,		
    LPPROPSHEETPAGE ppsp		
);		
Specifies an application-defined callback function that a property sheet calls when a page is created and when it is about to be destroyed. An application can use this function to perform initialization and cleanup operations for the page.
The return value depends on the value of uMsg.

hwnd
Reserved; must be NULL.
uMsg
Action flag. This parameter can be one of the following values:

PSPCB_CREATE A page is being created. Return nonzero to allow the page to be created, or zero to prevent it.
PSPCB_RELEASE A page is being destroyed. The return value is ignored.

ppsp
Address of a PROPSHEETPAGE structure that defines the page being created or destroyed.

An application must specify the address of this callback function in the pfnCallback member of a PROPSHEETPAGE structure before specifying the address of the structure in a call to the CreatePropertySheetPage function.

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PSPCB_CREATE	A page is being created. Return nonzero to allow the page to be created, or zero to prevent it.
PSPCB_RELEASE	A page is being destroyed. The return value is ignored.