ICM_DRAW_WINDOW message
The ICM_DRAW_WINDOW message notifies a rendering driver that the window specified for the ICM_DRAW_BEGIN message needs to be redrawn. The window has moved or become temporarily obscured. You can send this message explicitly or by using the ICDrawWindow macro.
ICM_DRAW_WINDOW
wParam = (DWORD_PTR) (LPVOID) prc;
lParam = 0;
Parameters
-
prc
-
Pointer to the destination rectangle in screen coordinates. If this parameter points to an empty rectangle, drawing should be turned off.
Return Value
Returns ICERR_OK if successful or an error otherwise.
Remarks
This message is supported by hardware that performs its own asynchronous decompression, timing, and drawing.
Video-overlay drivers use this message to draw when the window is obscured or moved. When a window specified for ICM_DRAW_BEGIN is completely hidden by other windows, the destination rectangle is empty. Drivers should turn off video-overlay hardware when this condition occurs.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 2000 Professional [desktop apps only] |
| Minimum supported server |
Windows 2000 Server [desktop apps only] |
| Header |
|