concatenated string as variable form name

[LowBrow]

StrongM has listed answered similar questions to mine many times (as here: thread222-795815), but I cannot get his solution to work for what I want. Here is some of code (it doesn't work, but it may help explain what I am trying to accomplish):

Private Sub cmdPickUp_Click()
Dim frm As Form
Dim frm2 As String
Dim strEnumerator As String
Dim strSubObject As String

Set frm = Forms(frmPCP_Edit_Main)

strEnumerator = Me.StatusID

strSubObject = "frm_Ques_" + strEnumerator

Set frm2 = Forms(strSubObject)

  If Me.StatusID < 1 Then
  
  frm.frm_Sub_Object.SourceObject = "frm_Ques_01"
    
  Else
  
  frm.frm_Sub_Object.SourceObject = frm2
    
  End If
    
End Sub

StatusID refers to the primary key of an edit table that will be a number between 1-73. These become the enumerator of the naming convention for my subforms. As users click through the subforms, the respective enumerator for that subform is updated to a hidden text box, which is in turn tied to the master record primary key field.

The goal of this code is have a 'pick up where you left off' option in an assessment db. I thought it would be a rather straightforward option. Now, I'm not so sure. I do not want to have to develop a 'case scenario' for all 73 subforms. But I cannot get Access to access the string as a form name. StrongM has solved this to some degree, but I cannot get his code to work with mine.

frmPCP_Edit_Main is the main form for the assessment.
frm_Sub_Object is the name of the subform control on frmPCP_Edit_Main.

All ideas appreciated! Thanks!