Liberty BASIC's native graphics commands caused printed text to appear in a rectangle of the currently set backcolor. If you want the text to have a transparent background so that it appears to be written directly on the graphics, whether drawn graphics or a bitmap, use SetBkMode as in the following demo. You must first get a DeviceContext for the graphicbox, the use SetBkMode with the _TRANSPARENT flag.
nomainwin WindowWidth=404:WindowHeight=340 graphicbox #1.gb, 1, 1, 400, 300 open "SetBkMode" for window as #1 #1 "trapclose [quit]" #1.gb "font arial 18 bold" #1.gb "down; fill darkpink" #1.gb "backcolor darkgreen; color yellow" 'get handle of graphicbox hGBox = hwnd(#1.gb) 'get device context handle of graphicbox CallDLL #user32, "GetDC",_ hGBox As ulong,_ 'handle of graphicbox gDC As ulong 'device context CallDLL #gdi32, "SetBkMode",_ gDC As ulong,_ 'handle of graphicbox _TRANSPARENT As long,_ 'flag for transparent background result As long 'previous bkmode ' To see the difference, set background mode to opaque ' by un-remming the following lines ' CallDLL #gdi32, "SetBkMode",_ ' gDC As ulong,_ 'handle of graphicbox ' _OPAQUE As long,_ 'flag for opaque background ' result As long 'previous bkmode 'you must free the device context callDLL#user32,"ReleaseDC",_ hGBox As ulong,_ 'graphicbox handle gDC As ulong,_ 'device context result As long #1.gb "\\ Transparent BkMode" #1.gb "\\ No darkgreen behind text." #1.gb "flush" wait [quit] close #1:end