CMDIChildWndEx::GetTaskbarPreviewWnd
Called by the framework when it needs to obtain a child window (usually a view or splitter window) to be displayed on a Windows 7 taskbar tab thumbnail.
virtual CWnd* GetTaskbarPreviewWnd();
Return Value
Should return a valid pointer to a CWnd object, whose preview should be displayed on a Windows 7 taskbar tab related to this MDI child. The default implementation returns a child window of this MDI child with AFX_IDW_PANE_FIRST control ID (which is usually a CView-derived class).
Requirements
Header: afxmdichildwndex.h