Public Class Form1
    Private WithEvents t As New Timer
    Dim wert As Int32 = 255
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles MyBase.Load
        Me.DoubleBuffered = True
        t.Interval = 20
        t.Start()
    End Sub
 
    Private Sub Form1_Paint(ByVal sender As Object, ByVal e As _
      System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        e.Graphics.FillRectangle(New SolidBrush(Color.FromArgb(wert, wert, _
        wert)), e.ClipRectangle)
    End Sub
 
    Private Sub t_Tick(ByVal sender As Object, ByVal e As System.EventArgs) _
      Handles t.Tick
        Me.Invalidate()
        wert -= 1
        If wert = 0 Then t.Stop()
    End Sub
End Class