Hi Frood , First of all thank you for your reply. I need to be clearer about my intentions, First normalize the maximized VFB window in the rendering state with the shortcut keys,
then stop Render. At first I just wanted to know if the VFB window had been showed, so I can omit a piece of code: CoronaRenderer.CoronaFp.showVfb (true), Unfortunately, my clients' demands have increased further, Hence the next few calls for help! Although I could have done it with this script, it is :windows.sendmessage hwnd WM_SYSCOMMAND SC_RESTORE 0 ,But I can't use the shortcut keys to control the maximized VFB in rendering, Forgive me for being so long-winded.