title: How to register mouse event from a different class
body: <p>I have a class which trying to register an event in another class.</p>
  
  <p>In class A I have a method as shown below:</p>
  
  <pre><code> public void Mouse_Down(object sender, MouseEventArgs e)
          {
  
          }
  </code></pre>
  
  <p>I am registering the event in class B like so:</p>
  
  <pre><code>            ClassA classA = new ClassA();
              classA.MouseDown += new MouseEventHandler(classA.Mouse_Down);
  </code></pre>
  
  <p>When click nothing is happening. Does anyone know what the problem could be.</p>