Option Explicit
'------------------------------------------------------------------------------------
'
'   http://www.excel-downloads.com/forum/81300-convertisseur-nombre-en-lettres.html
'
'------------------------------------------------------------------------------------
' Devise=0   aucune
'       =1   Euro €
'       =2   Dollar $
' Langue=0   Français
'       =1   Belgique
'       =2   Suisse
'------------------------------------------------------------------------------------
'
'   Conversion limitée à 999 999 999 999 999 ou 9 999 999 999 999,99
'   si le nombre contient plus de 2 décimales, il est arrondit à 2 décimales
'
'------------------------------------------------------------------------------------
 
Public Function ConvNumberLetter(Nombre As Double, Optional Devise As Byte = 0, _
                                 Optional Langue As Byte = 0) As String
Dim dblEnt As Variant, byDec As Byte
Dim bNegatif As Boolean
Dim strDev As String, strCentimes As String
 
    If Nombre < 0 Then
        bNegatif = True
        Nombre = Abs(Nombre)
    End If
    dblEnt = Int(Nombre)
    byDec = CInt((Nombre - dblEnt) * 100)
    If byDec = 0 Then
        If dblEnt > 999999999999999# Then
            ConvNumberLetter = "#TropGrand"
            Exit Function
        End If
    Else
        If dblEnt > 9999999999999.99 Then
            ConvNumberLetter = "#TropGrand"
            Exit Function
        End If
    End If
    Select Case Devise
        Case 0
            If byDec > 0 Then strDev = " virgule "
        Case 1
            strDev = " Euro"
            If dblEnt >= 1000000 And Right$(dblEnt, 6) = "000000" Then strDev = " d'Euro"
            If byDec > 0 Then strCentimes = strCentimes & " Cent"
            If byDec > 1 Then strCentimes = strCentimes & "s"
        Case 2
            strDev = " Dollar"
            If byDec > 0 Then strCentimes = strCentimes & " Cent"
    End Select
    If dblEnt > 1 And Devise <> 0 Then strDev = strDev & "s"
    strDev = strDev & " "
    If dblEnt = 0 Then
        ConvNumberLetter = "zéro " & strDev
    Else
        ConvNumberLetter = ConvNumEnt(CDbl(dblEnt), Langue) & strDev
    End If
    If byDec = 0 Then
        If Devise <> 0 Then ConvNumberLetter = ConvNumberLetter & "zéro Cent"
    Else
        If Devise = 0 Then
            ConvNumberLetter = ConvNumberLetter & _
                               ConvNumDizaine(byDec, Langue, True) & strCentimes
        Else
            ConvNumberLetter = ConvNumberLetter & _
                               ConvNumDizaine(byDec, Langue, False) & strCentimes
        End If
    End If
    ConvNumberLetter = Replace(ConvNumberLetter, "  ", " " )
    If Left(ConvNumberLetter, 1) = " " Then ConvNumberLetter = _
       Right$(ConvNumberLetter, Len(ConvNumberLetter) - 1)
    If Right$(ConvNumberLetter, 1) = " " Then ConvNumberLetter = _
       Left(ConvNumberLetter, Len(ConvNumberLetter) - 1)
End Function
 
Private Function ConvNumEnt(Nombre As Double, Langue As Byte)
Dim iTmp As Variant, dblReste As Double
Dim strTmp As String
Dim iCent As Integer, iMille As Integer, iMillion As Integer
Dim iMilliard As Integer, iBillion As Integer
 
    iTmp = Nombre - (Int(Nombre / 1000) * 1000)
    iCent = CInt(iTmp)
    ConvNumEnt = Nz(ConvNumCent(iCent, Langue))
    dblReste = Int(Nombre / 1000)
    If iTmp = 0 And dblReste = 0 Then Exit Function
    iTmp = dblReste - (Int(dblReste / 1000) * 1000)
    If iTmp = 0 And dblReste = 0 Then Exit Function
    iMille = CInt(iTmp)
    strTmp = ConvNumCent(iMille, Langue)
    Select Case iTmp
        Case 0
        Case 1
            strTmp = " mille "
        Case Else
            strTmp = strTmp & " mille "
    End Select
    If iMille = 0 And iCent > 0 Then ConvNumEnt = "et " & ConvNumEnt
    ConvNumEnt = Nz(strTmp) & ConvNumEnt
    dblReste = Int(dblReste / 1000)
    iTmp = dblReste - (Int(dblReste / 1000) * 1000)
    If iTmp = 0 And dblReste = 0 Then Exit Function
    iMillion = CInt(iTmp)
    strTmp = ConvNumCent(iMillion, Langue)
    Select Case iTmp
        Case 0
        Case 1
            strTmp = strTmp & " million "
        Case Else
            strTmp = strTmp & " millions "
    End Select
    If iMille = 1 Then ConvNumEnt = "et " & ConvNumEnt
    ConvNumEnt = Nz(strTmp) & ConvNumEnt
    dblReste = Int(dblReste / 1000)
    iTmp = dblReste - (Int(dblReste / 1000) * 1000)
    If iTmp = 0 And dblReste = 0 Then Exit Function
    iMilliard = CInt(iTmp)
    strTmp = ConvNumCent(iMilliard, Langue)
    Select Case iTmp
        Case 0
        Case 1
            strTmp = strTmp & " milliard "
        Case Else
            strTmp = strTmp & " milliards "
    End Select
    If iMillion = 1 Then ConvNumEnt = "et " & ConvNumEnt
    ConvNumEnt = Nz(strTmp) & ConvNumEnt
    dblReste = Int(dblReste / 1000)
    iTmp = dblReste - (Int(dblReste / 1000) * 1000)
    If iTmp = 0 And dblReste = 0 Then Exit Function
    iBillion = CInt(iTmp)
    strTmp = ConvNumCent(iBillion, Langue)
    Select Case iTmp
        Case 0
        Case 1
            strTmp = strTmp & " billion "
        Case Else
            strTmp = strTmp & " billions "
    End Select
    If iMilliard = 1 Then ConvNumEnt = "et " & ConvNumEnt
    ConvNumEnt = Nz(strTmp) & ConvNumEnt
End Function
 
Private Function ConvNumDizaine(Nombre As Byte, Langue As Byte, bDec As Boolean) As String
Dim TabUnit As Variant, TabDiz As Variant
Dim byUnit As Byte, byDiz As Byte
Dim strLiaison As String
 
    If bDec Then
        TabDiz = Array("zéro", "", "vingt", "trente", "quarante", "cinquante", _
                       "soixante", "soixante", "quatre-vingt", "quatre-vingt" )
    Else
        TabDiz = Array("", "", "vingt", "trente", "quarante", "cinquante", _
                       "soixante", "soixante", "quatre-vingt", "quatre-vingt" )
    End If
    If Nombre = 0 Then
        TabUnit = Array("zéro" )
    Else
        TabUnit = Array("", "un", "deux", "trois", "quatre", "cinq", "six", "sept", _
                        "huit", "neuf", "dix", "onze", "douze", "treize", "quatorze", "quinze", _
                        "seize", "dix-sept", "dix-huit", "dix-neuf" )
    End If
    If Langue = 1 Then
        TabDiz(7) = "septante"
        TabDiz(9) = "nonante"
    ElseIf Langue = 2 Then
        TabDiz(7) = "septante"
        TabDiz(8) = "huitante"
        TabDiz(9) = "nonante"
    End If
    byDiz = Int(Nombre / 10)
    byUnit = Nombre - (byDiz * 10)
    strLiaison = "-"
    If byUnit = 1 Then strLiaison = " et "
    Select Case byDiz
        Case 0
            strLiaison = " "
        Case 1
            byUnit = byUnit + 10
            strLiaison = ""
        Case 7
            If Langue = 0 Then byUnit = byUnit + 10
        Case 8
            If Langue <> 2 Then strLiaison = "-"
        Case 9
            If Langue = 0 Then
                byUnit = byUnit + 10
                strLiaison = "-"
            End If
    End Select
    ConvNumDizaine = TabDiz(byDiz)
    If byDiz = 8 And Langue <> 2 And byUnit = 0 Then ConvNumDizaine = ConvNumDizaine & "s"
    If TabUnit(byUnit) <> "" Then
        ConvNumDizaine = ConvNumDizaine & strLiaison & TabUnit(byUnit)
    Else
        ConvNumDizaine = ConvNumDizaine
    End If
End Function
 
Private Function ConvNumCent(Nombre As Integer, Langue As Byte) As String
Dim TabUnit As Variant
Dim byCent As Byte, byReste As Byte
Dim strReste As String
 
    TabUnit = Array("", "un", "deux", "trois", "quatre", "cinq", "six", "sept", _
                    "huit", "neuf", "dix" )
    byCent = Int(Nombre / 100)
    byReste = Nombre - (byCent * 100)
    strReste = ConvNumDizaine(byReste, Langue, False)
    Select Case byCent
        Case 0
            ConvNumCent = strReste
        Case 1
            If byReste = 0 Then
                ConvNumCent = "cent"
            Else
                ConvNumCent = "cent " & strReste
            End If
        Case Else
            If byReste = 0 Then
                ConvNumCent = TabUnit(byCent) & " cents"
            Else
                ConvNumCent = TabUnit(byCent) & " cent " & strReste
            End If
    End Select
End Function
 
Private Function Nz(strNb As String) As String
    If strNb <> " zéro" Then Nz = strNb
End Function