Visual Basic - convrtir Número a Texto

Hola, alguien sabe de algún código para convertir numeros a palabras, como los que se utilizan en los sistemas de facturación, Ejemplo 1690 = MIL SEISCIENTOS NOVENTA PESOS

Gracias por su tiempo

Function Aletra(Rcantidad As Double) As String
Dim Rcant As String
Dim cAux As String
Dim Runi As String
Dim Rdec As String
Dim rdecs As String
Dim rcen As String
Dim riter As Integer
Dim rnum As String
Dim cDecim As String

'Runi$ , Rdec$, Rdecs$, Rcen$, Rnum$, Riter$

Rcant = ""
Runi = " UN DOS TRES CUATROCINCO SEIS SIETE OCHO NUEVE "
Rdec = "DIEZ ONCE DOCE TRECE CATORCE QUINCE DIECISEIS DIECISIETEDIECIOCHO DIECINUEVE"
rdecs = " VEINTE TREINTA CUARENTA CINCUENTASESENTA SETENTA OCHENTA NOVENTA "
rcen = " DOS TRES CUATRO SEIS SETE OCHO NOVE "

Rcant = Trim(Str(Rcantidad))
If InStr(1, Rcant, ".") > 0 Then
'cAux = Left(Rcant, InStr(1, Rcant, ".") + 2)
cAux = cRound(Rcant, 2)
Rcant = cAux
If Mid(Rcant, Len(Rcant) - 1, 1) = "." Then
Rcant = Rcant + "0"
Rcant = Space(12 - Len(Left(Rcant, Len(Rcant) - 3))) + Rcant
Else
Rcant = Space(12 - Len(Left(Rcant, Len(Rcant) - 3))) + Rcant
cDecim = Right(Rcant, 2)
End If
Else
cDecim = "00"
End If
rnum = Mid(Rcant, 1, 12)
Rcant = ""
If Len(rnum) < 12 Then
rnum = Space(12 - Len(rnum)) + rnum
End If
If Val(rnum) = 0 Then
Rcant = "CERO PESOS "
Else
riter = 1
While riter < 13

If Mid(rnum, riter, 1) <> " " And Mid(rnum, riter, 1) <> "0" Then
Select Case Mid(rnum, riter, 1)
Case "1"
If Mid(rnum, riter + 1, 2) = "00" Then
Rcant = Rcant + "CIEN "
Else
Rcant = Rcant + "CIENTO "
End If
Case "5"
Rcant = Rcant + "QUINIENTOS "
Case Else
Rcant = Rcant + RTrim(Mid(rcen, Val(Mid(rnum, riter, 1)) * 6 + 1, 6)) + "CIENTOS "
End Select
End If

If Mid(rnum, riter + 1, 1) <> " " And Mid(rnum, riter + 1, 1) <> "0" Then
Select Case Mid(rnum, riter + 1, 1)
Case "1"
Rcant = Rcant + RTrim(Mid(Rdec, Val(Mid(rnum, riter + 2, 1)) * 10 + 1, 10)) + " "
Case "2"
If Mid(rnum, riter + 2, 1) = "0" Then
Rcant = Rcant + "VEINTE "
Else
Rcant = Rcant + "VEINTI" + RTrim(Mid(Runi, Val(Mid(rnum, riter + 2, 1)) * 6 + 1, 6)) + " "
End If
Case Else
Rcant = Rcant + RTrim(Mid(rdecs, Val(Mid(rnum, riter + 1, 1)) * 9 + 1, 9))
If Mid(rnum, riter + 2, 1) > "0" Then
Rcant = Rcant + " Y " + RTrim(Mid(Runi, Val(Mid(rnum, riter + 2, 1)) * 6 + 1, 6)) + " "
Else
Rcant = Rcant + " "
End If
End Select
End If

If Mid(rnum, riter + 2, 1) <> " " And Mid(rnum, riter + 1, 1) < "1" And Mid(rnum, riter + 1, 2) <> "00" Then
Rcant = Rcant + RTrim(Mid(Runi, Val(Mid(rnum, riter + 2, 1)) * 6 + 1, 6)) + " "
End If

Select Case riter
Case 1
If Mid(rnum, 1, 3) <> Space(3) And Mid(rnum, 1, 3) <> "000" Then
Rcant = Rcant + "MIL "
End If
Case 4
If Mid(rnum, 1, 6) <> Space(6) And Mid(rnum, 1, 6) <> "000000" Then
If Mid(rnum, 1, 6) <> Space(5) + "1" Then
Rcant = Rcant + "MILLONES "
Else
Rcant = Rcant + "MILLON "
End If
End If
Case 7
If Mid(rnum, 1, 9) <> Space(9) And Mid(rnum, 7, 3) <> "000" Then
Rcant = Rcant + "MIL "
End If
End Select
riter = riter + 3
Wend

If rnum = Space(11) + "1" Then
Rcant = Rcant + "PESO "
Else
If Mid(rnum, 7, 6) = "000000" Then
Rcant = Rcant + "DE PESOS "
Else
Rcant = Rcant + "PESOS "
End If
End If
End If

Rcant = LTrim(RTrim((Rcant + cDecim + "/100 M. N.")))
Aletra = Rcant

End Function
'sadddddddddddddddddddddddd
Function cRound(ByVal cVal, ByVal nDec) As String
Dim cAux, cRet As String
Dim nI, nPos, nAcum, nCurVal, nNextVal As Integer
nAcum = 0
nCurVal = 0
nNextVal = 0
cRet = ""
nPos = InStr(1, cVal, ".")
If nPos = 0 Then
'cAux = Padc("", nDec, "0")
cRet = cVal + "." + "00"
Else
cAux = Right(cVal, Len(cVal) - nPos)
If Len(cAux) > nDec Then
nPos = Len(cAux) - 1
For nI = nPos To nDec Step -1
nCurVal = Int(Val(Mid(cAux, nI + 1, 1)))
nNextVal = Int(Val(Mid(cAux, nI, 1)))
If nCurVal < 5 Then
nAcum = nNextVal
Else
nAcum = nNextVal + 1
End If
cRet = Mid(cAux, 1, nI - 1) + Trim(Str(nAcum))
Next
nPos = InStr(1, cVal, ".")
cRet = Left(cVal, nPos) + cRet
Else
nAcum = nDec - Len(Right(cVal, Len(cVal) - nPos))
cRet = cVal
For nI = 1 To nAcum
cRet = cRet + "0"
Next
End If
End If

cRound = cRet
End Function

'llamada a la funcion ***********************************************************************

S1 = Aletra(TXT_SALARIO.Text)

CSDK: Gracias por tu colaboracion, sin embargo, tu código no funcionaba bien. Buscando por google encontré :

http://www.elguille.info/VB/utilidades/num2letra.htm

Para todo aquel a quien le interese. Este trabaja a la primera.

bueno si tu lo dices no funciona pero en realidad es para k tu lo icieses funcionar no pudiste con un errorsito ni modo