Call this member function to invalidate the entire client area of CWnd.
void Invalidate( BOOL bErase = TRUE );
| Header File | Afxwin.h | 
| Platforms | |
| Versions | 1.0 and later | 
| Complete documentation | Visual C++ documentation | 
CWnd Overview, CWnd Member Functions, Window Class Categories, CWnd::BeginPaint, CWnd::ValidateRect