ICM_DRAW_WINDOW

	Overview

	Group

	Quick Info

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.