Visual Basic

//in Form1
Form2 f = new Form2();
f.button1.Click += ...;
f.button2.Click += ...;

//in Form2
public event EventHandler Button1Clicked;
public event EventHandler Button2Clicked;

//button1 event handler
private void button1_Click(object sender, EventArgs e) {
   if (Button1Clicked != null)
      Button1Clicked(this, EventArgs.Empty);
}

//in Form1
Form2 f = new Form2();
f.Button1Clicked += ...;
f.Button2Clicked += ...;

    Private WithEvents b1f2 As Button<br />
    Private WithEvents b2f2 As Button<br />
<br />
    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load<br />
<br />
        Dim form2 As New Form2<br />
<br />
        b1f2 = form2.btn1frm2<br />
        b2f2 = form2.btn2frm2<br />
        AddHandler b1f2.Click, AddressOf b1f2_click<br />
        AddHandler b2f2.Click, AddressOf b2f2_click<br />
<br />
        form2.Show()<br />
<br />
    End Sub<br />
<br />
    Private Sub b1f2_click(ByVal sender As System.Object, ByVal e As System.EventArgs)<br />
        ListBox1.Items.Add("1")<br />
    End Sub<br />
<br />
    Private Sub b2f2_click(ByVal sender As System.Object, ByVal e As System.EventArgs)<br />
        ListBox1.Items.Add("2")<br />
    End Sub<br />