WinQueryWindowPtr - Parameters

hwnd (HWND) - input

Window handle which has the pointer to retrieve.

index (LONG) - input

Zero-based index of the pointer value to retrieve.

The units of index are bytes. Valid values are zero through (cbWindowData -4), where cbWindowData is the parameter in WinRegisterClass that specifies the number of bytes available for application-defined storage.

The value QWP_PFNWP can be used for the address of the window's window procedure.

pRet (PVOID) - returns

Pointer value.

NULL

Error occurred.
Other
Pointer value.

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