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Public Function Numeros_Letras(ByVal Numero As Double, _
ByVal Moneda As String, _
Optional Fraccion_Letras As Boolean = False, _
Optional Fraccion As String = "", _
Optional Texto_Inicial As String = "", _
Optional Texto_Final As String = "", _
Optional Estilo As Integer = 1) As String
Dim strLetras As String
Dim NumTmp As String
Dim intFraccion As Integer
strLetras = Texto_Inicial
'Convertimos a positivo si es negativo
Numero = Abs(Numero)
NumTmp = Format(Numero, "000000000000000.00")
If Numero < 1 Then
strLetras = strLetras & "cero " & Plural(Moneda) & " "
Else
strLetras = strLetras & NumLet(Val(Left(NumTmp, 15)))
If Val(NumTmp) = 1 Or Val(NumTmp) < 2 Then
strLetras = strLetras & Moneda & " "
ElseIf Val(Mid(NumTmp, 4, 12)) = 0 Or Val(Mid(NumTmp, 10, 6)) = 0 Then
strLetras = strLetras & "de " & Plural(Moneda) & " "
Else
strLetras = strLetras & Plural(Moneda) & " "
End If
End If
If Fraccion_Letras Then
intFraccion = Val(Right(NumTmp, 2))
Select Case intFraccion
Case 0
strLetras = strLetras & "con cero " & Plural(Fraccion)
Case 1
strLetras = strLetras & "con un " & Fraccion
Case Else
strLetras = strLetras & "con " & NumLet(Val(Right(NumTmp, 2))) & Plural(Fraccion)
End Select
Else
strLetras = strLetras & Right(NumTmp, 2)
End If
strLetras = strLetras & Texto_Final
Select Case Estilo
Case 1
strLetras = StrConv(strLetras, vbUpperCase)
Case 2
strLetras = StrConv(strLetras, vbLowerCase)
Case 3
strLetras = StrConv(strLetras, vbProperCase)
End Select
Numeros_Letras = strLetras
End Function
Public Function NumLet(ByVal Numero As Double) As String
Dim NumTmp As String
Dim co1 As Integer
Dim co2 As Integer
Dim pos As Integer
Dim dig As Integer
Dim cen As Integer
Dim dec As Integer
Dim uni As Integer
Dim letra1 As String
Dim letra2 As String
Dim letra3 As String
Dim Leyenda As String
Dim TFNumero As String
NumTmp = Format(Numero, "000000000000000") 'Le da un formato fijo
co1 = 1
pos = 1
TFNumero = ""
'Para extraer tres digitos cada vez
Do While co1 <= 5
co2 = 1
Do While co2 <= 3
'Extrae un digito cada vez de izquierda a derecha
dig = Val(Mid(NumTmp, pos, 1))
Select Case co2
Case 1: cen = dig
Case 2: dec = dig
Case 3: uni = dig
End Select
co2 = co2 + 1
pos = pos + 1
Loop
letra3 = Centena(uni, dec, cen)
letra2 = Decena(uni, dec)
letra1 = Unidad(uni, dec)
Select Case co1
Case 1
If cen + dec + uni = 1 Then
Leyenda = "billon "
ElseIf cen + dec + uni > 1 Then
Leyenda = "billones "
End If
Case 2
If cen + dec + uni >= 1 And Val(Mid(NumTmp, 7, 3)) = 0 Then
Leyenda = "mil millones "
ElseIf cen + dec + uni >= 1 Then
Leyenda = "mil "
End If
Case 3
If cen + dec = 0 And uni = 1 Then
Leyenda = "millon "
ElseIf cen > 0 Or dec > 0 Or uni > 1 Then
Leyenda = "millones "
End If
Case 4
If cen + dec + uni >= 1 Then
Leyenda = "mil "
End If
Case 5
If cen + dec + uni >= 1 Then
Leyenda = ""
End If
End Select
co1 = co1 + 1
TFNumero = TFNumero + letra3 + letra2 + letra1 + Leyenda
Leyenda = ""
letra1 = ""
letra2 = ""
letra3 = ""
Loop
NumLet = TFNumero
End Function
Private Function Centena(ByVal uni As Integer, ByVal dec As Integer, _
ByVal cen As Integer) As String
Dim cTexto As String
Select Case cen
Case 1
If dec + uni = 0 Then
cTexto = "cien "
Else
cTexto = "ciento "
End If
Case 2: cTexto = "doscientos "
Case 3: cTexto = "trescientos "
Case 4: cTexto = "cuatrocientos "
Case 5: cTexto = "quinientos "
Case 6: cTexto = "seiscientos "
Case 7: cTexto = "setecientos "
Case 8: cTexto = "ochocientos "
Case 9: cTexto = "novecientos "
Case Else: cTexto = ""
End Select
Centena = cTexto
End Function
Private Function Decena(ByVal uni As Integer, ByVal dec As Integer) As String
Dim cTexto As String
Select Case dec
Case 1:
Select Case uni
Case 0: cTexto = "diez "
Case 1: cTexto = "once "
Case 2: cTexto = "doce "
Case 3: cTexto = "trece "
Case 4: cTexto = "catorce "
Case 5: cTexto = "quince "
Case 6 To 9: cTexto = "dieci"
End Select
Case 2:
If uni = 0 Then
cTexto = "veinte "
ElseIf uni > 0 Then
cTexto = "veinti"
End If
Case 3: cTexto = "treinta "
Case 4: cTexto = "cuarenta "
Case 5: cTexto = "cincuenta "
Case 6: cTexto = "sesenta "
Case 7: cTexto = "setenta "
Case 8: cTexto = "ochenta "
Case 9: cTexto = "noventa "
Case Else: cTexto = ""
End Select
If uni > 0 And dec > 2 Then cTexto = cTexto + "y "
Decena = cTexto
End Function
Private Function Unidad(ByVal uni As Integer, ByVal dec As Integer) As String
Dim cTexto As String
If dec <> 1 Then
Select Case uni
Case 1: cTexto = "un "
Case 2: cTexto = "dos "
Case 3: cTexto = "tres "
Case 4: cTexto = "cuatro "
Case 5: cTexto = "cinco "
End Select
End If
Select Case uni
Case 6: cTexto = "seis "
Case 7: cTexto = "siete "
Case 8: cTexto = "ocho "
Case 9: cTexto = "nueve "
End Select
Unidad = cTexto
End Function
'Funcion que convierte al plural el argumento pasado
Private Function Plural(ByVal Palabra As String) As String
Dim pos As Integer
Dim strPal As String
If Len(Trim(Palabra)) > 0 Then
pos = InStr(1, "aeiou", Right(Palabra, 1), vbTextCompare)
If pos > 0 Then
strPal = Palabra & "s"
Else
strPal = Palabra & "es"
End If
End If
Plural = strPal
End Function
