ICDrawStart macro (vfw.h)

Article
02/22/2024

The ICDrawStart macro notifies a rendering driver to start its internal clock for the timing of drawing frames. You can use this macro or explicitly call the ICM_DRAW_START message.

Syntax

void ICDrawStart(
   hic
);

Parameters

hic

Handle to a driver.

Return value

None

Remarks

This message is used by hardware that performs its own asynchronous decompression, timing, and drawing.

When the driver receives this message, it should start rendering data at the rate specified with the ICM_DRAW_BEGIN message.

The ICDrawStart and ICDrawStop macros do not nest. If your driver receives ICDrawStart before rendering is stopped with ICDrawStop, it should restart rendering with new parameters.

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