Access VBA - Changing TextBox value from within a function (ByRef) - function

Question

I'm trying to write a sub that will get two parameters - a textbox in a form and a text.
My intention is that the function will append the text into any textbox.
Sub AppendTextBox([any textbox in my form], text As String)
[code that appends the text parameter to the textbox]
End Sub
Please note that I'm not trying to append text to a specific textbox, but to create a function that can receive any textbox in the form and append it with any text.
Thanks for your help.

Answer 1

I've found the answer and it's much simpler than I though it is:
Private Sub AAA(A)
A.Value = "Desired text"
End Sub
Or if you want to append:
Private Sub AAA(A)
A.Value = A.Value & vbnewline & "Desired text"
End Sub

Answer 2

Hi Zephram have you managed to find the solution for this?
I have one but is a bit heavy because it uses loops. If you have one better let me know.
Private Function change_TextBox2(altera As String, textbox As ctl, valor As Variant)
Dim ctl As Control
If altera = "Popula" Then
For Each ctl In Me.Controls
With ctl
If (InStr(.Name, textbox)) > 0 Then
.Value = valor
End If
End With
Next ctl
ElseIf altera = "hide" Then
For Each ctl In Me.Controls
With ctl
If (InStr(.Name, textbox)) > 0 Then
.Visible = False
End If
End With
Next ctl
End If
End Function

Answer 3

can be accomplished by:
dim appendTxt as String: appendTxt = "appended text"
dim ws as Worksheet: for each ws in ActiveWorkbook.Worksheets
dim shape as Shape: for each shape in ws.Shapes
if shape.Type = msoTextBox then
'you can move this code parameterized to a separate function then as req by OP:
with shape.TextEffect: .Text = .Text & appendTxt
end if
next shape
next ws