How do i search the Windows Regestery?

From Delphi that is.

There is a TRegestry type component in Delphi that permits me to read and write to the regestry, but it does not seem to have a search facility.

All installed programs have there .EXE in the regestry, eg Word for windows, so when i want to run word from my application, it would be wisest to get the path from the regestry, (as it could of been moved from its default path).  to find its path i could do with a TRegestry.search(....) type function.  ayone know know what to write?

I would imagine it would look somthing like For 1 to Tregestry.GetKeyNames[list of key names for the regerstry root] do
move through each one using Copy(Tregestry.keyname.ReadString), last 8 letters) = Word.EXE
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Or if i knew that it was always in a particulr Root, (eg
00020901-0000-0000-c000-0000000046) but who on earth knows such things.

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Or perhaps if anyone knows the OLE/DDE type code to access the Windows Regestry editor and POKE or whatever a Find at it?

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Or perhaps some API that will search files, (i do not know much about how to get at or uses Win API calls, but somthing like a FileSearchTree(filehandel, .exename) type call?
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Or am i just barking up the wrong tree all together.
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Anyone know the best way to search for the current directory of the .EXE
Martin.