ICM_DRAW_START_PLAY
The
ICM_DRAW_START_PLAY message provides the start and end times of a play
operation to a rendering driver. You can send this message explicitly or by
using the ICDrawStartPlay
macro.
ICM_DRAW_START_PLAY
wParam = (DWORD) lFrom;
lParam = (DWORD) lTo;
Parameters
lFrom
Start time.
lTo
End time.
Return Values
This message
does not return a value.
Remarks
This message precedes
any frame data sent to the rendering driver.
Units for lFrom
and lTo are specified with the ICM_DRAW_BEGIN message. For video data this
is normally a frame number. For more information about the playback rate, see
the dwRate and dwScale members of the ICDRAWBEGIN structure.
If the end
time is less than the start time, the playback direction is reversed.
See Also