Macro to Loop Through Check Boxes Inside a Group Box

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1. In a new workbook, enter the following onto a Visual Basic for Applications module sheet:

      Sub SetCheckBoxes()
   
            ' Declare variables.
            Dim GB As Object, CB As Object
   
            ' Set variables (makes the following lines much shorter).
            Set DS = DialogSheets(1)
            Set GB = DS.GroupBoxes(1)
   
            ' Loop through all of the check boxes on the dialog sheet.
            For Each CB In DS.CheckBoxes
   
               ' Test if the check boxes' top-left corner is inside the group-
               ' box
               If CB.Left > GB.Left And CB.Left < GB.Left + GB.Width And _
                  CB.Top > GB.Top And CB.Top < GB.Top + GB.Height Then
                  ' If it is inside, then set the Value to xlOn.
                  CB.Value = xlOn
               End If
            Next
   
         End Sub
   						

2. Insert a dialog sheet.
3. Add a group box large enough to place several check boxes within it.
4. Add several check boxes, some inside of the group box and some outside of it.
5. Run the macro.
   
   The check boxes whose top-left corner is inside the group box will be checked.