ICDrawWindow macro (vfw.h)

Article
02/22/2024

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

void 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

None

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