Puzzle Vb.Net

Contohnya :

Public Class Form1
    Dim d As Integer = 0
    Dim a As Button
    Dim b As Point
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If d = 0 Then
            b = Button1.Location
            d = 1
            a = Button1
        Else
            a.Location = Button1.Location
            Button1.Location = b
            d = 0
        End If
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        If d = 0 Then
            b = Button2.Location
            d = 1
            a = Button2
        Else
            a.Location = Button2.Location
            Button2.Location = b
            d = 0
        End If
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        If d = 0 Then
            b = Button3.Location
            d = 1
            a = Button3
        Else
            a.Location = Button3.Location
            Button3.Location = b
            d = 0
        End If
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        If d = 0 Then
            b = Button4.Location
            d = 1
            a = Button4
        Else
            a.Location = Button4.Location
            Button4.Location = b
            d = 0
        End If
    End Sub

    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        If d = 0 Then
            b = Button5.Location
            d = 1
            a = Button5
        Else
            a.Location = Button5.Location
            Button5.Location = b
            d = 0
        End If
    End Sub

    Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
        If d = 0 Then
            b = Button6.Location
            d = 1
            a = Button6
        Else
            a.Location = Button6.Location
            Button6.Location = b
            d = 0
        End If
    End Sub

    Private Sub Button7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button7.Click
        If d = 0 Then
            b = Button7.Location
            d = 1
            a = Button7
        Else
            a.Location = Button7.Location
            Button7.Location = b
            d = 0
        End If
    End Sub

    Private Sub Button8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button8.Click
        If d = 0 Then
            b = Button8.Location
            d = 1
            a = Button8
        Else
            a.Location = Button8.Location
            Button8.Location = b
            d = 0
        End If
    End Sub

    Private Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click
        If d = 0 Then
            b = Button9.Location
            d = 1
            a = Button9
        Else
            a.Location = Button9.Location
            Button9.Location = b
            d = 0
        End If
    End Sub
End Class