Referencing Userform Control From Another Userform / Class Via Variable

I have several non-modal userforms in my App, some of them have date-fields that require manual entry typing of dd/mm/yy etc (No single userform has more than one date-box in it, this I think may be pivotally useful)

Now the Userform 'Calendar' that is built on the class of the same (cCalendar) name, has the write value line 'ActiveCell.value = theCal.value'

I'm looking to change this to refer to the correct userform.Textbox value, depending on which form is open.

I would imagine I could simply have a global string, whose value is set (or re-set) whenever a Userform is initialized (some sort of 'ActiveUF.value = Me.Name), where I get lost is referring to the components by name, so as to have a case statement by where I go:

Code:

Private Sub theCal_AfterUpdate()
Select Case ActiveUF
Case "AddForm"
application.vbe.components("AddForm").controls("AddFormDatePicker").value = theCal.value
Case "EditForm"
'.... etc
end select
end sub

better way of doing this (instead of passing around the userform name as a variable) - or proper syntax for referring to controls outside of the 'active' userform (but an open userform nonetheless)?

Every time I have to do this particular thing with userforms, I completely forget how, and the object browser always leads me on an infinite loop of Application.vbe.activevbproject.vbcomponents.vbe.active....

PS - there may be one slight complication to the process - one of the forms, has a 2-tab page in it, each page having similar (but named differently) fields. So I may need to be able to throw in 'Activepage' or whatnot