The ICM_DRAW_GET_PALETTE message requests a rendering driver to return a palette.
ICM_DRAW_GET_PALETTE
wParam = 0;
lParam = 0;
The driver should return one of the following: a handle of the palette being used, NULL if it doesn't have a handle to return, or ICERR_UNSUPPORTED if it doesn't support palettes.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in vfw.h.
Video Compression Manager Overview, Video Compression Messages