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The ICDrawWindow macro 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 use this macro or explicitly call the ICM_DRAW_WINDOW message.
Syntax
DWORD ICDrawWindow(
hic,
prc
);
Parameters
hic
Handle to a driver.
prc
Pointer to the destination rectangle in screen coordinates. If this parameter points to an empty rectangle, drawing should be turned off.
Return value
Type: DWORD
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] |
| Target Platform | Windows |
| Header | vfw.h |