ICM_DRAW_WINDOW
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) (LPVOID) prc;
lParam = 0;
Parameters
prc
Address of
the destination rectangle in screen coordinates. If this parameter points to an
empty rectangle, drawing should be turned off.
Return Values
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.
See Also