CWnd::get_accState
Visual Studio 2008
Called by the framework to retrieve the current state of the specified object.
virtual HRESULT get_accState( VARIANT varChild, VARIANT *pvarState );
This function is part of MFC's Active Accessibility support.
Override this function in your CWnd-derived class if you have nonwindowed user interface elements (other than windowless ActiveX controls, which MFC handles).
For more information, see IAccessible::get_accState in the Windows SDK.