向指定文件添加内容的vbs函数

'vbscript实现的向指定的文件写字符串，第三个参数指定是否删除原来的内容
Function Z_WriteFile(sFileName, sText, bAppend)
Dim fs, fso, iomode
if bAppend = True Then
iomode = 8 'ForAppending
else
iomode = 2 'ForWriting
end if
set fs = CreateObject("Scripting.FileSystemObject")
set fso = fs.OpenTextFile(sFileName, iomode, True) '第三个参数表明文件不存在，则新建文件
fso.WriteLine sText
fso.Close
set fso = Nothing
set fs = Nothing
End Function

Dim path, sFileName, sText
path = "F:\files\VBScript"
sFileName = path & "\1.txt"
sText = "what can I do for you"
Z_WriteFile sFileName, sText, True