If none of the flags are specified, the default is to match on the FOURCC.

The following is a procedure prototype for a standard CODEC procedure call.

PCODECPROC APIENTRY mmioLoadCODECProc
                    (PCODECINIFILEINFO pCODECIniFileInfo,
                    PHMODULE phMod, ULONG ulFlags);

The following example shows how to call a CODEC Proc and the required parameters.

LONG APIENTRY CODECProc (phCODEC, usMsg, 1Param1, 1Param2)

Note that CODECProc represents the entry point of a CODEC DLL.

phCODEC(PHCODEC) - Input/Output:

Pointer to a CODEC instance handle returned by MMIOM_CODEC_OPEN.

usMsg(USHORT) - Input

The message that the CODEC Proc is asked to process. The following predefined messages are documented separately.

MMIOM_CODEC_OPEN
MMIOM_CODEC_CLOSE
MMIOM_CODEC_COMPRESS
MMIOM_CODEC_DECOMPRESS
MMIOM_CODEC_QUERYNAME
MMIOM_CODEC_QUERYNAMELENGTH

1Param1(LONG) - input/output

Specifies additional message information.

1Param2(LONG) - input/output

Specifies additional message information.