The ICM_DRAW_BEGIN message notifies a rendering driver to prepare to draw data.
ICM_DRAW_BEGIN wParam = (DWORD) (LPVOID) &icdrwBgn; lParam = sizeof(ICDRAW);
Pointer to 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.
|ICERR_BADFORMAT||Input or output format is not supported.|
|ICERR_NOTSUPPORTED||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 ICM_DECOMPRESS_BEGIN message.
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.
|Minimum supported client
||Windows 2000 Professional [desktop apps only]
|Minimum supported server
||Windows 2000 Server [desktop apps only]