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.
DWORD ICDrawStart(
hic
);
This macro does not return a value.
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.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in vfw.h.
Video Compression Manager Overview, Video Compression Macros, ICDrawStop, ICM_DRAW_START