CContainedWindowT::RegisterWndSuperclass
Called by Create to register the window class of the contained window.
ATOM RegisterWndSuperClass( );
Return Value
If successful, an atom that uniquely identifies the window class being registered; otherwise, zero.
Remarks
This window class is based on an existing class but uses CContainedWindowT::WindowProc. The existing window class's name and window procedure are saved in m_lpszClassName and m_pfnSuperWindowProc, respectively.
Requirements
Header: atlwin.h