Private Sub cmdAddieren_Click()
If TextBox1.Text <> "" Then
Range("A1").Value = Range("A1").Value + CDbl(TextBox1.Text)
End If
If TextBox2.Text <> "" Then
Range("B3").Value = Range("B3").Value + CDbl(TextBox2.Text)
End If
If TextBox3.Text <> "" Then
Range("C6").Value = Range("C6").Value + CDbl(TextBox3.Text)
End If
End Sub