This example lets you find the current Desktop object and sets the current lockup background to BACKGROUND_TILED_IMAGE and BACKGROUND_IMAGE.
WPDesktop *Desktop; Desktop = _wpclsQueryObjectFromPath("<WP_DESKTOP>"); _wpSetLockupBackground(Desktop, "?:\\os2\\bitmap\\warplogo.bmp", BACKGROUND_TILED_IMAGE, 1, BACKGROUND_IMAGE, CYAN);