How can I access a checkbox control on a content page if I know the checkbox’s ID?

I have tried the code below, but using Me.Controls does not seam to generate a controls collection beyond the MasterPage… or I am way off target and have not figured it out yet.

Thanks for your help in advance.

Code:
            Dim ctr As Control
            Dim s as String
 
            For Each s In Str_ArrayList ‘these are the checkbox IDs

                For Each ctr In Me.Controls
                    If ctr.ID = s Then
                        CType(ctr, CheckBox).Checked = True
                    End If
                Next
            Next