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ICM_DRAW_WINDOW message (Vfw.h) |
The ICM\_DRAW\_WINDOW message notifies a rendering driver that the window specified for the ICM\_DRAW\_BEGIN message needs to be redrawn. |
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reference |
05/31/2018 |
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; -
prc
-
Pointer to the destination rectangle in screen coordinates. If this parameter points to an empty rectangle, drawing should be turned off.
Returns ICERR_OK if successful or an error otherwise.
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.
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 2000 Professional [desktop apps only] |
| Minimum supported server |
Windows 2000 Server [desktop apps only] |
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