Declare an event handler publicly to do so in your user control. call the same in the event through which you want to pass it suppose you want to pass your user control on click event of button on your user control call this handler.
Declaration :
public EventHandler handler;
Call:
protected void btn_Click(object sender, EventArgs e)
{
...
handler(sender, e);
......
}
Now you can use this as an event with your usercontrol on the form you are using it...