Hi Gary.
I've tried the code above, without success.
Maybe I need to initialize array elements with some value? If yes, what value?

With Thisform
   Local laDig1, laDig2
   Dimension laDig1[.oleCaptura.MinutiaeSize] As Byte
   Dimension laDig2[.oleCaptura.MinutiaeSize] As Byte
   If .oleCaptura.LiveCapture(6000,50)
      Do While Not .oleCaptura.IsCaptured
      Enddo
      Comarray(.oleCaptura,10)
      If .oleCaptura.GetMinutiaeData(@laDig1)
         Thisform.oleCaptura.Clear()
         If .oleCaptura.LiveCapture(6000,50)
            Do While Not .oleCaptura.IsCaptured
            Enddo
            Comarray(.oleCaptura,10)
            If .oleCaptura.GetMinutiaeData(@laDig2)
               Comarray(.oleCaptura,10)
               Messagebox(.oleVerifica.GetMatchingScore(laDig1, laDig2),64,"Score") && Always returns 0, value must be greater than 100!
               Comarray(.oleCaptura,10)
               If .oleVerifica.Register(laDig1, laDig2) && Return invalid parameter error
               Else
                  Messagebox(.oleVerifica.ErrorString,16,"Erro 1")
               Endif
            Else
               Messagebox(.oleCaptura.ErrorString,16,"Erro 2")
            Endif
         Else
            Messagebox(.oleCaptura.ErrorString,16,"Erro 3")
         Endif
      Else
         Messagebox(.oleCaptura.ErrorString,16,"Erro 4")
      Endif
   Else
      Messagebox(.oleCaptura.ErrorString,16,"Erro 5")
   Endif
   Comarray(.oleCaptura)
Endwith