Set focus on document from Userform

[mdmackillop]

With reference to my MergeField Select KB entry, I would like it to "Set Focus" to the document after a mergefield is added. The code to add the field is :
MD

[VBA]
Private Sub ListBox1_DblClick(ByVal Cancel As MSForms.ReturnBoolean)
'Add listbox item to document
ActiveDocument.Fields.Add Range:=Selection.Range, Type:=wdFieldMergeField _
, Text:=ListBox1
End Sub
[/VBA]