ICOpenFunction function (vfw.h)

The ICOpenFunction function opens a compressor or decompressor defined as a function.

Syntax

HIC VFWAPI ICOpenFunction(
  DWORD   fccType,
  DWORD   fccHandler,
  UINT    wMode,
  FARPROC lpfnHandler
);

fccType

Type of compressor to open. For video, the value of this parameter is ICTYPE_VIDEO.

fccHandler

Preferred handler of the specified type. Typically, this comes from the stream header in an AVI file.

wMode

Flag to define the use of the compressor or decompressor. The following values are defined.

Value	Meaning
ICMODE_COMPRESS	Compressor will perform normal compression.
ICMODE_DECOMPRESS	Decompressor will perform normal decompression.
ICMODE_DRAW	Decompressor will decompress and draw the data directly to hardware.
ICMODE_FASTCOMPRESS	Compressor will perform fast (real-time) compression.
ICMODE_FASTDECOMPRESS	Decompressor will perform fast (real-time) decompression.
ICMODE_QUERY	Queries the compressor or decompressor for information.

lpfnHandler

Pointer to the function used as the compressor or decompressor.

Returns a handle to a compressor or decompressor if successful or zero otherwise.

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	vfw.h
Library	Vfw32.lib
DLL	Msvfw32.dll