Public Class Form1
    Dim i As Integer = 2
    Dim bColor(8) As Color
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles MyBase.Load
        For x = 0 To 7
            bColor(x) = CType(Me.Controls("Button" & x + 1), Button).BackColor
        Next
    End Sub
    Private Sub Button1_Click(ByVal sender As Object, ByVal e As  _
     System.EventArgs) Handles Button1.Click
 
        If Label1.Text = "" Then
 
            Label1.Text = "Problem erfolgreich gelöst"
 
            Button1.Text = "löschen"
            Button1.BackColor = Color.OrangeRed
 
        Else
            Button1.Text = "löschen"
            Label1.Text = ""
            Button1.Text = "Ausgabe"
            Button1.BackColor = Color.LightGreen
 
 
            CType(Me.Controls("Button" & i), Button).BackColor = Color.Pink
            i += 1
            If i > 8 Then
                For x = 0 To 7
                    CType(Me.Controls("Button" & x + 1), Button).BackColor = _
                      bColor(x)
                Next
                i = 2
            End If
 
        End If
 
    End Sub
End Class

Gruss Caddy