Note  Indexing Service is no longer available for use as of Windows XP. Instead, use Windows Search.

The FiltReg.exe program inspects filter installation information in the registry. You invoke the filtreg.exe program from the command line simply by typing its name:

filtreg

Filtreg.exe enumerates all file name extensions that have filters associated with them by printing the file name extension and the name of the filter DLL for the extension. This is a simple way to verify the correct installation of a filter.

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Build date: 5/10/2011