Call a method present in a form which is there in other project using delegates

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VB

delegates

I have two projects Project1 and Project2. I have refernce of Project2 in Project1.
I have declared a Delegate in Project2 and on click of button I am invoking the Delegate.
Project2 - Form2 Code :

Public Delegate Sub ExternalDelegate()
Public Class Form2
    Public Event Del As ExternalDelegate

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        RaiseEvent Del()
    End Sub
End Class

In my project1 I have form1 where I have to register to the event present in Form2 of project2.

So can anyone tell me how to call a method present in Form1 from form2.

Let me know if my question is not clear .