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ICM_DECOMPRESSEX message

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The ICM_DECOMPRESSEX message notifies a video compression driver to decompress a frame of data directly to the screen, decompress to an upside-down DIB, or decompress images described with source and destination rectangles.

ICM_DECOMPRESSEX 
wParam = (DWORD_PTR) (LPVOID) &icdex; 
lParam = sizeof(ICDECOMPRESSEX);

Parameters

icdex

Pointer to an ICDECOMPRESSEX structure.

lParam

Size, in bytes, of ICDECOMPRESSEX.

Return Value

Returns ICERR_OK if successful or an error otherwise.

Remarks

This message is similar to ICM_DECOMPRESS except that it uses the ICDECOMPRESSEX structure to define its decompression information.

If you want the driver to decompress data directly to the screen, send the ICM_DRAW message.

The driver returns an error if this message is received before the ICM_DECOMPRESSEX_BEGIN message.

Requirements

Requirement Value
Minimum supported client
 Windows 2000 Professional [desktop apps only]
Minimum supported server
 Windows 2000 Server [desktop apps only]
Header
Vfw.h

See also

Video Compression Manager

Video Compression Messages