vbs进行正则表达式匹配的方法和需注意的问题

Function RegExpTest(patrn,strng)
  Dim regEx,Match,Matches        
  Set regEx = New RegExp         
  regEx.Pattern = patrn         
  regEx.IgnoreCase = True       
  regEx.Global = True           
  Set Matches = regEx.Execute(strng) 
  For Each Match in Matches 
    'RetStr = RetStr & "Match " & I & " found at position "
    'RetStr = RetStr & Match.FirstIndex & ". Match Value is "'
    'RetStr = RetStr & Match.Value & "'." & vbCRLF
    'RetStr=replace(strng,Match.Value,"")
    RetStr=RetStr & Match.FirstIndex & ". Match Value is "+Match.Value+"<br>"
  Next
  RegExpTest = RetStr
End Function


'RegExpTest("is.","IS1 is2 IS3 is4")
'RegExpTest("/d*/./d+"," ??? 0.0007")

'使用下面的匹配<IMG ....>中所有(含换行)，但剔除符号> <IMG([^>]*|(.|\n)*)> '若单独使用 <IMG(.|\n)*>将忽略>符号，匹配到了字符结束 <IMG[\\s\\S]*?>将匹配不到