WPF mouse and button Detection

Using System;
Using System. Windows;
Using System. Windows. Input;

Namespace BrawDraw. Com. WPF. HandleEvents
{
Class HandleAnEvent
{
[STAThread]
Public static void Main ()
{
Application app = new Application ();

Window win = new Window ();
Win. Title = "Handle An Event ";
Win. MouseDown + = WindowOnMouseDown;
Win. KeyUp + = WindowOnKeyUp;

App. Run (win );
}
Static void WindowOnMouseDown (object sender, MouseButtonEventArgs args)
{
Window win = sender as Window;
String msg =
String. Format ("{0} mouse button at position ({1 ",
Args. ChangedButton, args. GetPosition (win ));
MessageBox. Show (msg, win. Title );
}
Static void WindowOnKeyUp (object sender, KeyEventArgs args)
{
Window win = sender as Window;
If (args. Key! = Key. Return