finding the userform.designer hidden commands

DanMcG 

I'm not familiar with designer or if it can be used to accomplish what I think you are trying to do.

I've also not created many dynamic userforms, so I'm far from an expert on the subject, but if you want to add, remove, or modify controls, then I believe you should be able to create an object reference to your userform before you show it and add/remove/modify it's controls using the methods of the userform and it's controls collection.

When working with the control itself, you may have to dim it as a control to get some methods you want and intellisense won't display the methods/properties specific to that type of control, but you may still be able to use them.

This page will probably be a good reference (especially for the control ID's under the add method):

https://docs.microsoft.com/en-us/office/vba/language/reference/user-interface-help/reference-microsoft-forms

Private Sub Macro1()
     Dim uForm As UserForm1
     Dim newLabel As MSForms.Control
     
     Set uForm = New UserForm1
     Set newLabel = uForm.Controls.Add("Forms.Label.1", "Label1", True)
     
     With newLabel
          .Caption = "Test"
          .Move 20, 20, 40, 10
     End With
     
     uForm.Show
     
End Sub