以下这段转换人民币大小写的函数，如何在窗体中使用？

以下这段转换人民币大小写的函数，如何在窗体中使用？

Private Function Num2Char(ByVal i As Integer) As String
If i >= 0 And i <= 9 Then
Num2Char = Mid$("零壹贰叁肆伍陆柒捌玖", i + 1, 1)
Else
Num2Char = ""
End If
End Function
Private Function Num2RMB(ByVal sFourBitString As String, Optional _
ByVal sUnit As String = "元", Optional ByVal bMustHeader As _
Boolean = False) As String
'----------------------------------------------------------------------
Dim vNum, i, RX, BR, hdr
'------------------------------------------------------------------
BR = "仟佰拾元"
'------------------------------------------------------------------
vNum = Trim(Str(Val(sFourBitString))) ' 最多四位
'------------------------------------------------------------------
If (Len(vNum) < 4 And Len(vNum) > 0) And bMustHeader Then hdr = "零" _
Else hdr = ""
RX = ""
Do While Len(vNum) > 0
i = Right(vNum, 1)
If i > 0 Then
RX = Num2Char(i) + Right(BR, 1) + RX
Else
If Left(RX, 1) <> "零" Then RX = "零" + RX
End If
vNum = Left(vNum, Len(vNum) - 1)
BR = Left(BR, Len(BR) - 1)
Loop
RX = Left(RX, Len(RX) - 1)
If Right(RX, 1) = "零" Then ' 去除多余的零
RX = Left(RX, Len(RX) - 1)
End If
If Len(RX) > 0 Then
Num2RMB = hdr + RX + sUnit
Else
Num2RMB = RX + IIf(sUnit = "元", "元", "")
End If
End Function
Function GetDXJE(ByVal num As Currency) As String ' 得到大写金额
'----------------------------------------------------------------------
Dim vNum, vDec, ret, qb
'------------------------------------------------------------------
vNum = Right(Format(Int(num), "000000000000"), 12) ' 取十二位整数
vDec = Right(Format(Int(num * 100 + 0.5), "00"), 2) ' 取小数点后两位并自动四舍五入
'------------------------------------------------------------------
ret = Num2RMB(Left(vNum, 4), "亿", False)
If Len(ret) = 0 Then
ret = Num2RMB(Mid(vNum, 5, 4), "万", False)
Else
ret = ret + Num2RMB(Mid(vNum, 5, 4), "万", True)
End If
If Len(ret) = 0 Then
ret = Num2RMB(Right(vNum, 4), "元", False)
Else
ret = ret + Num2RMB(Right(vNum, 4), "元", True)
End If
'------------------------------------------------------------------
If ret = "元" Then
ret = ""
qb = ""
Else
qb = "xx"
End If
'------------------------------------------------------------------
If vDec = "00" And qb <> "" Then '1.00
ret = ret + "整"
End If
If vDec = "00" And qb = "" Then '0.00
ret = "(无金额)"
End If
If Left(vDec, 1) <> "0" And Right(vDec, 1) = 0 And qb <> "" Then '1.20
ret = ret + Num2Char(Left(vDec, 1)) + "角整"
End If
If Left(vDec, 1) = "0" And Right(vDec, 1) <> 0 And qb <> "" Then '1.03
ret = ret + "零" + Num2Char(Right(vDec, 1)) + "分"
End If
If Left(vDec, 1) <> "0" And Right(vDec, 1) <> 0 And qb <> "" Then '1.23
ret = ret + Num2Char(Left(vDec, 1)) + "角" + Num2Char(Right(vDec, 1)) + "分"
End If
If Left(vDec, 1) <> "0" And Right(vDec, 1) = 0 And qb = "" Then '0.20
ret = Num2Char(Left(vDec, 1)) + "角整"
End If
If Left(vDec, 1) = "0" And Right(vDec, 1) <> 0 And qb = "" Then '0.03
ret = Num2Char(Right(vDec, 1)) + "分"
End If
If Left(vDec, 1) <> "0" And Right(vDec, 1) <> 0 And qb = "" Then '0.23
ret = Num2Char(Left(vDec, 1)) + "角" + Num2Char(Right(vDec, 1)) + "分"
End If
GetDXJE = ret
'----------------------------------------------------------------------
End Function