C# :: Handling Middle Mouse Click Event

I'm trying to create a program which can pan by keep clicking and move the mouse

1. First, I create a class that inherited from the UserControl Class

public partial class CanvasCtrl : UserControl
protected void OnMiddleMouseDown(object sender, MouseEventArgs e) {
if (e.Button == MouseButtons.Middle) {

[Code] ....

2, Second, I create the void in that class too, and write the code to get it to catch the event

public void MainMouseAction() {
this.MouseClick += new MouseEventHandler(OnMiddleMouseDown);
}

It not work, how to solve this out ?