ICM_DECOMPRESSEX

See also ICDecompressEx, ICM_DECOMPRESSEX_BEGIN, ICM_DECOMPRESSEX_END, ICM_DRAW_BEGIN

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.

• Returns ICERR_OK if successful or an error otherwise.

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.