Option Explicit
Function Sothanhchu(ByVal MyNumber)
    Dim Dollars, Cents, Temp
    Dim DecimalPlace, Count
    ReDim Place(9) As String
    Place(2) = " nghin  "
    Place(3) = " trieu "
    Place(4) = " ti "
    Place(5) = " ti ti "
       MyNumber = Trim(Str(MyNumber))
      DecimalPlace = InStr(MyNumber, ".")
       If DecimalPlace > 0 Then
        Cents = GetTens(Left(Mid(MyNumber, DecimalPlace + 1) & "00", 2))
        MyNumber = Trim(Left(MyNumber, DecimalPlace - 1))
    End If
    Count = 1
    Do While MyNumber <> ""
        Temp = GetHundreds(Right(MyNumber, 3))
        If Temp <> "" Then Dollars = Temp & Place(Count) & Dollars
        If Len(MyNumber) > 3 Then
            MyNumber = Left(MyNumber, Len(MyNumber) - 3)
        Else
            MyNumber = ""
        End If
        Count = Count + 1
    Loop
    Select Case Dollars
        Case ""
            Dollars = "Khong Dong"
        Case "One"
            Dollars = "Mot Dong"
         Case Else
            Dollars = Dollars & " Dong"
    End Select
    Select Case Cents
        Case ""
            Cents = " and No Cents"
        Case "One"
            Cents = " and One Cent"
              Case Else
            Cents = " and " & Cents & " Cents"
    End Select
       Sothanhchu = Dollars
End Function
   
Function GetHundreds(ByVal MyNumber)
    Dim Result As String
    If Val(MyNumber) = 0 Then Exit Function
    MyNumber = Right("000" & MyNumber, 3)
    If Mid(MyNumber, 1, 1) <> "0" Then
        Result = GetDigit(Mid(MyNumber, 1, 1)) & " tram "
    End If
        If Mid(MyNumber, 2, 1) <> "0" Then
        Result = Result & GetTens(Mid(MyNumber, 2))
    Else
        Result = Result & GetDigit(Mid(MyNumber, 3))
    End If
    GetHundreds = Result
End Function
    
Function GetTens(TensText)
    Dim Result As String
    Result = ""
    If Val(Left(TensText, 1)) = 1 Then
        Select Case Val(TensText)
            Case 10: Result = "Muoi"
            Case 11: Result = "Muoi mot"
            Case 12: Result = "Muoi hai"
            Case 13: Result = "Muoi ba"
            Case 14: Result = "Muoi bon"
            Case 15: Result = "Muoi lam"
            Case 16: Result = "Muoi sau"
            Case 17: Result = "Muoi bay"
            Case 18: Result = "Muoi tam"
            Case 19: Result = "Muoi chin"
            Case Else
        End Select
    Else
        Select Case Val(Left(TensText, 1))
            Case 2: Result = "Hai muoi "
            Case 3: Result = "Ba muoi "
            Case 4: Result = "Bon muoi "
            Case 5: Result = "Nam muoi "
            Case 6: Result = "Sau muoi "
            Case 7: Result = "Bay muoi "
            Case 8: Result = "Tam muoi "
            Case 9: Result = "Chin muoi "
            Case Else
        End Select
        Result = Result & GetDigit(Right(TensText, 1))
    End If
    GetTens = Result
End Function
    
Function GetDigit(Digit)
    Select Case Val(Digit)
        Case 1: GetDigit = "Mot"
        Case 2: GetDigit = "Hai"
        Case 3: GetDigit = "Ba"
        Case 4: GetDigit = "Bon"
        Case 5: GetDigit = "Nam"
        Case 6: GetDigit = "Sau"
        Case 7: GetDigit = "Bay"
        Case 8: GetDigit = "Tam"
        Case 9: GetDigit = "Chin"
        Case Else: GetDigit = ""
    End Select
End Function
       

4. Cách sử dụng như sau : tại ô kết quả bạn gõ