Can not simulate Win+D on Metro UI in Windows 8?

Question

I want to switch Metro UI to desktop. Simulate Win+D can work on traditional desktop, but can not work on Metro UI. Code as below:

  keybd_event(VK_LWIN, MapVirtualKeyEx(VK_LWIN,0,GetKeyboardLayout(0)),  0, 0);
    Sleep(30);
    keybd_event(VK_D  ,MapVirtualKeyEx(VK_D,0,GetKeyboardLayout(0)) ,  0, 0);
    Sleep(30);

    keybd_event(VK_D , MapVirtualKeyEx(VK_D,0,GetKeyboardLayout(0)) ,   KEYEVENTF_KEYUP,0);
    Sleep(30);
    keybd_event(VK_LWIN, MapVirtualKeyEx(VK_LWIN,0,GetKeyboardLayout(0)), KEYEVENTF_KEYUP,0);

Win+C can work well. Please tell me why it can not work well.

Answer 1

My best guess would be that this is made on purpose to make sure no one create for instance an app which will simulate Win+D minimizing to the desktop after login. MS wants all users to land on the metro start panel and have made many blockers for coming directly to the desktop at login.

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Blogging about Windows for IT pros at www.theexperienceblog.com

Answer 2

Do you try to send key in the Metro App, unfortunately, it is no allowed (keybd_event is Desktop onlyhttp://msdn.microsoft.com/en-us/library/windows/desktop/ms646304(v=vs.85).aspx), and cannot send the key Win+D via code to switch to the desktop feom Metro App.

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Bob Bao [MSFT]
MSDN Community Support | Feedback to us

Answer 3

Do you try to send key in the Metro App, unfortunately, it is no allowed (keybd_event is Desktop onlyhttp://msdn.microsoft.com/en-us/library/windows/desktop/ms646304(v=vs.85).aspx), and cannot send the key Win+D via code to switch to the desktop feom Metro App.

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Bob Bao [MSFT]
MSDN Community Support | Feedback to us

Win+C can work, why Win+D can't work?

Answer 4

Do you mean call keybd_event function in Metro App? This function as I said is for desktop app only.

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Bob Bao [MSFT]
MSDN Community Support | Feedback to us

Answer 5

I call  keybd_event in Destop app when cursor on Metro Start Menu,  Win+C can work but Win+D can't work.