You are probably right; but, of course, the GroupName property is not the
same as a GroupBox... the OP's use of references to names for controls from
both the Forms and Visual Basic toolbars is what left me (and still leaves
me) wondering exactly what he is doing.

Rick

For now, I've written 2 routines that allow me to perform this function.

Now, all I have to do is call the function to get the value of the obtion
button that is selected (assumes values of 1 to N) for the buttons, returns a
zero if not selected.  Same for setting the values.

Public Function GetFrameValue(og As Frame) as integer

   Dim intPointer As Integer
   
   GetFrameValue = 0
   For intPointer = 0 To og.Controls.Count - 1
       If og.Controls(intPointer) = True Then
           GetFrameValue = intPointer + 1
       End If
   Next
   
End Function
Public Sub SetFrameValue(og As Frame, SomeValue As Integer)

   Dim intPointer As Integer
   
   For intPointer = 0 To og.Controls.Count - 1
       og.Controls(intPointer) = (intPointer = SomeValue - 1)
   Next
   
End Sub

When you say "determine which is selected", if you mean literally that use
ActionControl but see below for testing if in a frame
If you mean determine which optionbutton is 'true' you'll need to poll all
Optionbuttons in the frame or group.you are interested in.

You can refer to a control by it's index number (instead of its name) which
is set at design time and will never change. It'll be the nth item placed on
the form counting from zero and also the m'th item if say in a Frame. Where
a control is in a container such as a frame it will have two index numbers,
one that relates to the form and another to the nth control on the frame.

frm.controls(n)
frm.Frame1.controls(m)

Pick anything of use in the following, assumes a Frame on a form containing
some optionbuttons and other controls on the form, perhaps also
optionbuttons.

Private Sub UserForm_Click()
Dim ctr As Control, ob As MSForms.OptionButton

   If TypeName(Me.ActiveControl) = "Frame" Then
       Set ctr = Me.ActiveControl.ActiveControl
   Else
       Set ctr = Me.ActiveControl
   End If

   MsgBox ctr.Name, , ctr.Parent.Name

   MsgBox Me.Frame1.Controls(0).Name

   'if you are certain the frame only contains optionbuttons
   For i = 0 To Me.Frame1.Controls.Count - 1
       With Me.Frame1.Controls
           Debug.Print .Item(i).Caption, .Item(i).Value
       End With
   Next

   For i = 0 To Me.Controls.Count - 1
       Debug.Print i, Me.Controls(i).Name
   Next

End Sub

Regards,
Peter T

What I suggested should work similarly with Optionbuttons on a Userform as
on a sheet and code behind the sheet module.

Regards,
Peter T