Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
    System.EventArgs) Handles Button1.Click
    Diagnostics.Process.Start("mailto:Mailadresse")
  End Sub

Visual Basic Express 2010, C# Express 2010
Intel? i7 Core 920@2.63 Ghz, 6 GByte DDR3, 1024 MB ATI? Radeon? 5870, Windows 7 Prof. 64 Bit
Gibson SG 61' Reissue ; Ibanez Prestige RG 2550 E, Marshall Valvestate VS100 + Modell Vs412 (4 x 12''), Cubase Studio