Remove the desktop item from the alt-tab menu@win7

folklore

http://www.askvg.com/how-to-get- ... indows-vista-and-7/

BONUS TIP: If you don't want to set the Classic "Alt+Tab" Switcher screen permanent but want to enjoy it temporarily, then you can follow these simple steps:
Press and hold Left or Right Alt key.
Now press and release the other Alt key on your keyboard but keep pressing the first Alt key.
Now press Tab key and you'll get the Windows XP styled Classic "Alt+Tab" Switcher screen.

Its a bug in Windows Vista and 7. Actually this bug can also be reproduced in Windows Vista Beta versions...

folklore

Get the main-form of winform application:

System.Windows.Forms.Form MainForm = (System.Windows.Forms.Form)System.Windows.Forms.Control.FromHandle(System.Diagnostics.Process.GetCurrentProcess().MainWindowHandle);