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ICM_COMPRESS

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The ICM_COMPRESS message notifies a video compression driver to compress a frame of data into an application-defined buffer.

ICM_COMPRESS 
wParam = (DWORD) (LPVOID) &icc; 
lParam = sizeof(ICCOMPRESS);

Parameters

icc

Pointer to an ICCOMPRESS structure. The following members of this structure specify the compression parameters: lpbiInput, lpInput, lpbiOutput, lpOutput, lpbiPrev, lpPrev, lpckid, lpdwFlags, dwFrameSize, and dwQuality.

The driver should also use the biSizeImage member of the BITMAPINFOHEADER structure associated with lpbiOutput of ICCOMPRESS to return the size of the compressed frame.

lParam

Size, in bytes, of ICCOMPRESS.

Return Values

Returns ICERR_OK if successful or an error otherwise.

Requirements

**  Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
**  Windows 95/98/Me:** Included in Windows 95 and later.
**  Header:** Declared in Vfw.h.

See Also

Video Compression Manager, Video Compression Messages, BITMAPINFOHEADER, ICCOMPRESS