The ICM_DRAW_BEGIN message notifies a rendering driver to prepare to draw
wParam = (DWORD) (LPVOID) &icdrwBgn;
lParam = sizeof(ICDRAW);
Address of an ICDRAWBEGIN
structure containing the input format.
Size, in bytes, of ICDRAWBEGIN
Returns ICERR_OK if the driver supports drawing the data to the screen in the
specified manner and format, or an error code otherwise. Possible error values
include the following:
||Input or output format is not supported.
||Driver does not draw directly to the screen or does not support this message.
If you want the driver to decompress data into a buffer, send the
The ICM_DRAW_BEGIN and ICM_DRAW_END messages do not nest. If your driver
receives ICM_DRAW_BEGIN before decompression is stopped with ICM_DRAW_END, it should
restart decompression with new parameters.
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