Private Sub cmdSumar_Click()
Dim lv_element As ListSubItems
Dim ld_suma As Double
Dim li_Ultima
li_Ultima = 3 'Columna del importe
For Each lv_element In Me.ListView1.ListItems
ld_suma = CDbl(ld_suma + lv_element(li_Ultima).Text)
Next
Me.TxtSuma = Format(ld_suma, "Currency")
End Sub