Hi,

Please take a look at the slideshow, this should describe the problem better than words ;)

Link to slideshow: http://rapidshare.com/files/76639891/Infragistics_Toolbar_test.zip

EDIT:

Also, when you make Form's ControlBox = False in the above project, pressing Alt+Tab while debugging it generates exception

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
   at Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.ShowSystemMenu(Boolean showApplicationMenuIfVisible, Form form)
   at Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.FormSubClasser.WndProcImpl(Message& m)
   at Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.FormSubClasser.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at System.Windows.Forms.NativeWindow.DefWndProc(Message& m)
   at System.Windows.Forms.Form.DefWndProc(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ContainerControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Dinesh.