Public Class Form1
  Inherits System.Windows.Forms.Form
 
  <font color=red>Private File As System.IO.File</font>
 
  Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click
 
    If <font color=red>File</font>.<font color=blue>Exists</font>( _
      "DeineDatei.txt") Then
      MsgBox("Datei existiert!")
    Else
      MsgBox("Datei Existsiert nicht!")
    End If
  End Sub
End Class