以下是自定义函数：

Option Explicit

'Main Function
Function SpellNumber(ByVal MyNumber)
    Dim Dollars, Cents, Temp
    Dim DecimalPlace, Count
    ReDim Place(9) As String
    Place(2) = " Thousand "
    Place(3) = " Million "
    Place(4) = " Billion "
    Place(5) = " Trillion "
    ' String representation of amount.
    MyNumber = Trim(Str(MyNumber))
    ' Position of decimal place 0 if none.
    DecimalPlace = InStr(MyNumber, ".")
    ' Convert cents and set MyNumber to dollar amount.
    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 = "No Dollars"
    Case "One"
        Dollars = "One Dollar"
    Case Else
        Dollars = Dollars & " Dollars"
    End Select
    Select Case Cents
    Case ""
        Cents = " and No Cents"
    Case "One"
        Cents = " and One Cent"
    Case Else
        Cents = " and " & Cents & " Cents"
    End Select
    SpellNumber = Dollars & Cents
End Function

' Converts a number from 100-999 into text
Function GetHundreds(ByVal MyNumber)
    Dim Result As String
    If Val(MyNumber) = 0 Then Exit Function
    MyNumber = Right("000" & MyNumber, 3)
    ' Convert the hundreds place.
    If Mid(MyNumber, 1, 1) <> "0" Then
        Result = GetDigit(Mid(MyNumber, 1, 1)) & " Hundred "
    End If
    ' Convert the tens and ones place.
    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

' Converts a number from 10 to 99 into text.
Function GetTens(TensText)
    Dim Result As String
    Result = "" ' Null out the temporary function value.
    If Val(Left(TensText, 1)) = 1 Then ' If value between 10-19...
        Select Case Val(TensText)
        Case 10: Result = "Ten"
        Case 11: Result = "Eleven"
        Case 12: Result = "Twelve"
        Case 13: Result = "Thirteen"
        Case 14: Result = "Fourteen"
        Case 15: Result = "Fifteen"
        Case 16: Result = "Sixteen"
        Case 17: Result = "Seventeen"
        Case 18: Result = "Eighteen"
        Case 19: Result = "Nineteen"
        Case Else
        End Select
    Else ' If value between 20-99...
        Select Case Val(Left(TensText, 1))
        Case 2: Result = "Twenty "
        Case 3: Result = "Thirty "
        Case 4: Result = "Forty "
        Case 5: Result = "Fifty "
        Case 6: Result = "Sixty "
        Case 7: Result = "Seventy "
        Case 8: Result = "Eighty "
        Case 9: Result = "Ninety "
        Case Else
        End Select
        Result = Result & GetDigit _
            (Right(TensText, 1)) ' Retrieve ones place.
    End If
    GetTens = Result
End Function

' Converts a number from 1 to 9 into text.
Function GetDigit(Digit)
    Select Case Val(Digit)
    Case 1: GetDigit = "One"
    Case 2: GetDigit = "Two"
    Case 3: GetDigit = "Three"
    Case 4: GetDigit = "Four"
    Case 5: GetDigit = "Five"
    Case 6: GetDigit = "Six"
    Case 7: GetDigit = "Seven"
    Case 8: GetDigit = "Eight"
    Case 9: GetDigit = "Nine"
    Case Else: GetDigit = ""
    End Select
End Function

应用演示：