Looping through Controls in VB.NET

Question

I am creating a chess program. And it is composed of sixty four picture boxes with alternating black and white background colours.
I have named them pba1,

Answer 1

Loop through the PictureBox's in your ControlCollection and test for BackColor. I used the Form's ControlCollection, if they are in some other type of container control use that.

For Each cntrl As Control In Me.Controls
    If TypeOf cntrl Is PictureBox Then
        If cntrl.BackColor = Color.Black Then
            'Do Something
        End If
    End If
Next

---

Base on the additional information that you gave in your answer, the reason your example is not working is that the Controls Name is a String and you are comparing it to the PictureBox Control not the Name of the Control.

You can try using the Tag Property instead of the Name of the Control, it will be cleaner and easier to read. I just put a 1 in the PictureBox's Tag Property for Black and a 0 for White.

Private Sub OriginalColour()               
    For Each cntrl As Control In Me.Controls
        Dim result As Integer
        If TypeOf cntrl Is PictureBox Then
            If Integer.TryParse(cntrl.Tag.ToString, result) Then
                If result = 1 Then
                    cntrl.BackColor = Color.Gray
                Else
                    cntrl.BackColor = Color.White
                End If
            End If

        End If
    Next
End Sub