"I think you'll find its alt+f12"
Alt + F4 closes the focused window - what does Alt + F12 do -doesn't seem to do anything on my pc?
try this from wiki - might help..
There is no single consistent shortcut for closing a document or quitting an application in Windows XP. In many multiple document interface applications, Ctrl+W or Ctrl+F4 closes a document and Alt+F4 quits. In other applications where each document is in its own window, such as later versions of Microsoft Word, Ctrl+W, Ctrl+F4, and Alt+F4 close a document, and there is no consistent shortcut for quitting an application.