Select Case Label1.Text
     Case "0"
        ImageButton1.ImageUrl = "photo/white.png"
        Label1.Text = "1"
     Case "1"
        ImageButton1.ImageUrl = "photo/black.png"
        Label1.Text = "2"
     Case "2"
        ImageButton1.ImageUrl = "photo/TransparentBtn.png"
        Label1.Text = "0"
 End Select