Object required = Passing Listbox to a custom function

This is function that i have put in my userform module. The idea is to populate listbox from a select range, and remove empty items within userform_init module.

Private Sub RemoveEmptyRows(lst As ListBox) 'make sure this is not an activex listbox 
    Dim i As Long
    With lst
        For i = .ListCount - 1 To 0 Step -1
            If .List(i) = Empty Then
                .RemoveItem i
            End If
        Next
    End With
End Sub

I have all of my code in userform. My object hierarchy is as follows: FindReplace (Userform) => FANumbers (Listbox)

When I try to use the function in userform_init procedure to clear empty items in the listbox, I get Object Required error?

RemoveEmptyRows(Me.FANumbers)

This doesn't work even when I change data type from msforms.listbox to listbox in the function parameter.

I also tried removing Me but still gives the same error.

Now there is an alternative way that works such as:

'With Me.FANumbers
     'For r = .ListCount - 1 To 0 Step -1
          'If .List(r) = "" Then .RemoveItem r
     'Next r
'End With

But I am trying to learn how to pass a value to a function for my own knowledge sake. Please guide me how to pass the listbox argument.

Change ListBox to msFoms.ListBox

Private Sub RemoveEmptyRows(lst As MSForms.ListBox)

However, if the RowSource perperty is used, you will get error at .RemoveItem/