I'm trying to use WM_SetDesktopColor() function to draw the background window with a green color, but it seems it doesn't work.
The only solution is to specify a custom callback for desktop window through WM_SetCallback(WM_HBKWIN, cbBackgroundWin); and manually manage the WM_PAINT message with the following code:
The only solution is to specify a custom callback for desktop window through WM_SetCallback(WM_HBKWIN, cbBackgroundWin); and manually manage the WM_PAINT message with the following code: