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The ICM_DECOMPRESS_SET_PALETTE message specifies a palette for a video decompression driver to use if it is decompressing to a format that uses a palette. You can send this message explicitly or by using the ICDecompressSetPalette macro.

wParam = (DWORD_PTR) (LPVOID) lpbiPalette; 
lParam = 0; 



Pointer to a BITMAPINFOHEADER structure whose color table contains the colors that should be used if possible. You can specify zero to use the default set of output colors.

Return Value

Returns ICERR_OK if the decompression driver can precisely decompress images to the suggested palette using the set of colors as they are arranged in the palette. Returns ICERR_UNSUPPORTED otherwise.


This message should not affect decompression already in progress; rather, colors passed using this message should be returned in response to future ICM_DECOMPRESS_GET_FORMAT and ICM_DECOMPRESS_GET_PALETTE messages. Colors are sent back to the decompression driver in a future ICM_DECOMPRESS_BEGIN message.

This message is used primarily when a driver decompresses images to the screen and another application that uses a palette is in the foreground, forcing the decompression driver to adapt to a foreign set of colors.


Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]



See also

Video Compression Manager
Video Compression Messages