Cycling through Controls in a Panel

I have a panel on a form which contains both Radio Buttons and ComboBoxes. I thought this should work

Code:

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Private Function CheckBoxesAllSet() As Boolean
  CheckBoxesAllSet = True
  For Each chkBox As CheckBox In Panel2.Controls
    If chkBox.Checked = False Then
      CheckBoxesAllSet = False
    End If
  Next
End Function

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But I get error message: "Unable to cast object of type 'System.Windows.Forms.ComboBox' to type 'System.Windows.Forms.CheckBox'."

Comments appreciated
.

I would suggest determining the type of the control first, before directly casting it. Some psuedo code would look like this :

Code:

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Private Function CheckBoxesAllSet() As Boolean
  CheckBoxesAllSet = True
Dim ct As Control

  For Each ct In Panel2.Controls
If TypeOf ct Is CheckBox Then
    If ct.Checked = False Then
      CheckBoxesAllSet = False
    End If
  Next
End If
End Function

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I hope it helps!

Yes, that is the way I did it! I was really hoping somebody knew how to do it in one shot but thanks anyway for replying!

You can actually take it one stage further if you have something inside a container. This is something I wrote:

Code:

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For Each cntA In frmCalledByFP.Controls
    If TypeOf cntA is Panel then
      panPanel = CType(cntA, Panel)
      For Each cntB In panPanel.Controls 
        If TypeOf cntB is Button then
          If cntB.Name = "cmdContinue" then
            cmdButton = CType(cntB, Button)
            cmdButton.Text = "Continue"
            frmCalledByFP.Show()
            'cmdButton.PerformClick 
            On Error GoTo 0
            Exit Sub
          End If
        End If
      Next
    End If
  Next

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Hope this helps somebody! Yes, I know that "On Error GoTo 0" is now a bit passe but I am converting a lot of code from VB6 ...
.