Check this
Graphics3D 640,480,32,1 SetBuffer BackBuffer() App=GetActiveWindow() Delay 2000 ShowWindow(App,0) ; hide teh window and activate another ; Launch other app here ; Send this windows hwnd parameter as cmdline par to the other app. then use winapi to Show the window again (ShowWindow(Hwnd,5)) While Not KeyHit(1) RenderWorld UpdateWorld Flip Wend