ICM_DRAW_REALIZE

wParam = (DWORD) (UINT) (HDC) hdc;
lParam = (DWORD) (BOOL) fBackground;

Notifies a rendering driver to realize its drawing palette while drawing.

Returns ICERR_OK if the drawing palette is realized or ICERR_UNSUPPORTED if the palette associated with the decompressed data is realized.

wParam: Handle of the DC used to realize the palette.
lParam: Background flag. Specify TRUE to realize the palette as a background task or FALSE to realize the palette in the foreground.

Drivers need to respond to this message only if the drawing palette is different from the decompressed palette.