The ICM_DRAW_START message notifies a rendering driver to start its internal
clock for the timing of drawing frames. You can send this message explicitly or
by using the ICDrawStart
wParam = 0;
lParam = 0;
This message 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
The ICM_DRAW_START and ICM_DRAW_STOP messages do not nest. If your driver
receives ICM_DRAW_START before rendering is stopped with ICM_DRAW_STOP, it should
restart rendering with new parameters.
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