Public Class Form1
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles MyBase.Load
        PictureBox1.SetBounds(10, 10, 200, 100)
        PictureBox1.BackColor = Color.Beige
    End Sub
 
    Private Sub PictureBox1_MouseDown(ByVal sender As Object, ByVal e As _
      System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseDown
        Dim x As Int32 = e.X \ 50
        Dim y As Int32 = e.Y \ 50
        Me.Text = "Bereich " & x + (y * 4).ToString
    End Sub
End Class