ICM_DECOMPRESSEX

wParam = (DWORD) (LPVOID) &icdex;
lParam = sizeof(ICDECOMPRESSEX);
 

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.

wParam
Address of an ICDECOMPRESSEX structure.
lParam
Size, in bytes, of the ICDECOMPRESSEX structure.

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.

See Also

ICDecompressEx, ICM_DECOMPRESSEX_BEGIN, ICM_DECOMPRESSEX_END, ICM_DRAW_BEGIN