It may be a good start but it does not cover all the URL formats.

>Ok, I see the point
>
>Still, you can make a pattern that does not accept a ) as the last char.. Something like
>
>
>

>((http[s]?|ftp)://[\w/.()-]+[\w/.(-])
>

>
>it will match
>

>http://msdn.microsoft.com/en-us/library/aa172799(SQL.80).aspx
>
>and 
>http://msdn.microsoft.com/en-us/library/aa172799SQL.80.aspx
>
>in 
>
>(http://msdn.microsoft.com/en-us/library/aa172799SQL.80.aspx)
>