Public Class Form1
    Private WithEvents f As New Form2
 
    Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles TextBox1.TextChanged
        f.TextBox1.Text = Me.TextBox1.Text
    End Sub
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles MyBase.Load
        f.Show()
    End Sub
    Private Sub f_FormClosed(ByVal sender As Object, ByVal e As _
      System.Windows.Forms.FormClosedEventArgs) Handles f.FormClosed
        MsgBox("Form2 wurde geschlossen")
    End Sub
End Class

Gru?

Silver