This method updates the client area by sending a WM_PAINT message, if the update region is not empty. This method sends a WM_PAINT message directly, bypassing the application queue. If the update region is empty, WM_PAINT is not sent.
| Header file: | Afxwin.h |
| Platforms: | H/PC 2.0, Palm-size PC, H/PC Pro |
| Windows CE versions: | 1.0 and later |
| Complete documentation: | Visual C++ documentation |
void UpdateWindow( );