ICOPEN  RXGK23 

The ICOPEN structure contains information about the data stream being compressed or decompressed, the version number of the driver, and how the driver is used.

typedef struct { 

    DWORD    dwSize;

    DWORD    fccType;

    DWORD    fccHandler;

    DWORD    dwVersion;

    DWORD    dwFlags;

    LPRESULT dwError;

    LPVOID   pV1Reserved;

    LPVOID   pV2Reserved;

    DWORD    dnDevNode;

} ICOPEN;

Members

dwSize

Size, in bytes, of the structure.

fccType

Four-character code indicating the type of stream being compressed or decompressed. Specify  VIDC  for video streams.

fccHandler

Four-character code identifying a specific compressor.

dwVersion

Version of the installable driver interface used to open the driver.

dwFlags

Applicable flags indicating why the driver is opened. The following values are defined:

ICMODE_COMPRESS

Driver is opened to compress data.

ICMODE_DECOMPRESS

Driver is opened to decompress data.

ICMODE_DRAW

Device driver is opened to decompress data directly to hardware.

ICMODE_QUERY

Driver is opened for informational purposes, rather than for compression.

dwFlags

Error return values.

pV1Reserved

Reserved; do not use.

pV2Reserved

Reserved; do not use.

dnDevNode

Device node for plug and play devices.

Remarks

This structure is passed to video capture drivers when they are opened. This allows a single installable driver to function as either an installable compressor or a video capture device. By examining the fccType member of the ICOPEN structure, the driver can determine its function. For example, a fccType value of  VIDC  indicates that it is opened as an installable video compressor.