Access - 2 Unbound Textboxes to filter a List based on which is being filled in

Good morning (or afternoon depending on where you are)

I have a Form where there are a series of unbound text boxes and an unbound Listbox.

I use 2 of the text boxes to Filter my Listbox.  Those 2 text boxes are "txtLName" and "txtEntity".  So if the user is inputting a person's name they fill in the textbox "txtLName" but if they are inputting an Entity name like XYZ Corp then they would fill in the textbox "txtEntity".

Now then, as they complete the textbox "txtLName" it works.  But, if I don't input anything into "txtLName" and just start inputting into the "txtEntity" I get an error (Run-time error '2185' You can't reference a property or method for a control unless the control has the focus).

I haven't even added code yet for the txtEntity textbox.
  My code is:

Private Sub txtLName_Change()
    Call lstExistNameUpdate
    
End Sub
Private Sub txtEntity_Change()
    Call lstExistNameUpdate

End Sub

Private Sub lstExistNameUpdate()
Dim strLName As String, lngLenLName As Long, lngSortSel As Long
lngSortSel = Me.frameExistingParties.Value

    If IsNull(Me.txtLname.Text) = False And Len(Me.txtLname.Text) > 0 Then
        strLName = Me.txtLname.Text
        lngLenLName = Len(Me.txtLname.Text)
        If lngSortSel = 1 Then
            Me.lstExistingParties.RowSource = "SELECT RecPartyID, RecLName, RecFName, RecMName, RecSufName, RecEntityName, EntityNameType, PartyFullNameFML, PartyFullNameLFM, SortName FROM qrytbl_Parties WHERE SortName LIKE '" & strLName & "*' ORDER BY SortName ASC"
        Else
            Me.lstExistingParties.RowSource = "SELECT RecPartyID, RecLName, RecFName, RecMName, RecSufName, RecEntityName, EntityNameType, PartyFullNameFML, PartyFullNameLFM, SortName FROM qrytbl_Parties WHERE SortName LIKE '" & strLName & "*' ORDER BY SortName DESC"
        End If
    Else
        If lngSortSel = 1 Then
            Me.lstExistingParties.RowSource = "SELECT RecPartyID, RecLName, RecFName, RecMName, RecSufName, RecEntityName, EntityNameType, PartyFullNameFML, PartyFullNameLFM, SortName FROM qrytbl_Parties ORDER BY SortName ASC"
        Else
            Me.lstExistingParties.RowSource = "SELECT RecPartyID, RecLName, RecFName, RecMName, RecSufName, RecEntityName, EntityNameType, PartyFullNameFML, PartyFullNameLFM, SortName FROM qrytbl_Parties ORDER BY SortName DESC"
            End If
    End If

End Sub

Select allOpen in new window