How to work with delegates and event handler for user control

Question

I have created a user control that contains a button. I am using this control on my winform which will be loaded at run time after fetching data from database.

Now I

Answer 1

Just modernizing ChéDon's answer, here is how you can do it in 2018:

public class MyControl : UserControl
{
  public event EventHandler InnerButtonClick;

  public MyControl()
  {
    InitializeComponent();
    innerButton.Click += innerButton_Click;
  }

  private void innerButton_Click(object sender, EventArgs e)
  {
      InnerButtonClick?.Invoke(this, e);
      //or
      InnerButtonClick?.Invoke(innerButton, e); 
      //depending on what you want the sender to be
  }
}