How to make work text search in files

When you want to search all files containing a certain word or phrase, sometimes, no result comes even if you're sure that at least on file match your search criterias.
This is due to filtering : in XP, to avoid too many uninteresting files to "pollute" your results, file extension must have been flagged in order to being searched.

So if your .java, .jsp, .bas, .cls , etc... aren't searched and you want them to be, follow this (Beware : this tip only work with plain text files) :

Add a PersistentHandler key under the file type key in HKEY_CLASSES_ROOT and set its (Default) string value name to the following value:
{5e941d80-bf96-11cd-b579-08002b30bfeb}
[color red]WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Use Registry Editor at your own risk.[/color]

For example, to use the text filter provider for .zzz files, the following registry setting should exist:
HKEY_CLASSES_ROOT\.zzz\PersistentHandler\(Default) = {5e941d80-bf96-11cd-b579-08002b30bfeb}
After you add this value to the registry, you must log off and then log back on to make the change take effect.

For more informations see : http://support.microsoft.com/default.aspx?scid=KB;EN-US;q309173&

NOTE : there are also known problems with this tool in the original release of XP that have been corrected by SP1 (download at : http://www.microsoft.com/WindowsXP/pro/downloads/servicepacks/sp1/default.asp)