The ICM_DECOMPRESSEX_QUERY message is sent to a video compression driver to determine if the driver can decompress a specific input format, or if it can decompress the input format to a specific output format.
Parameters
dwParam1
Specifies a pointer to an ICDECOMPRESSEX structure describing the input format.
dwParam2
Specifies zero or a pointer to an ICDECOMPRESSEX structure used to return the output format. Zero indicates that any output format is acceptable.
Return Value
Returns ICERR_OK if the specified decompression is supported. Otherwise, returns ICERR_BADFORMAT indicating that the input or output format is not supported.