The ICM_DECOMPRESS message is sent to a video compression driver to decompress a frame of data into an application-supplied buffer.
Returns ICERR_OK if successful. Otherwise, returns an error number.
If the driver is to decompress data directly to the screen instead of a buffer, it receives the ICM_DRAW message.
The driver should return an error if this message is received before the ICM_DECOMPRESS_BEGIN message.