is "/lib" needed in PATH?

[Linda W]

I have been putting "/lib" in my windows path (along with "/bin").

Do I need to specify cygwin's "lib" dir so it will load the "DLL's", or
do the cygwin binaries internally "know" (add?) lib to the path to search.

I.e. I want to be able to call some cygwin based utils (like bash) from
Windows.  Normally with windows programs, directories containing DLL's
that are needed by Window's Programs need to have the DLL dir in the path
(unless it is in same dir as the EXE).  Is this also true for cygwin 
EXE's or
does cygwin handle apart from (in spite of) the normal rules for locating
DLL's?

If this is in the FAQ, I've forgotten it...

Thanks!
Linda


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