CMDIChildWndEx::InvalidateIconicBitmaps
Invalidates an iconic bitmap representation of a MDI child.
BOOL InvalidateIconicBitmaps();
Return Value
Returns FALSE if Windows 7 taskbar support is disabled or the MDI child is not registered with Windows 7 taskbar tabs; otherwise returns TRUE.
Remarks
Should be called when the live content or size of a MDI child has changed.
Requirements
Header: afxmdichildwndex.h