Assuming you get the full file name ... 
dir /b/S *.dsp | perl -e 'BEGIN{@ARGV=map{ chomp and $_ }<ARGV>}' \
                      -i.bak -pe "s#\bGPP\b#Arjun#i;"

[download]
No longer a oneliner, but it should do the job.
HTH

_________
broquaint

In reply to Re: command lineIn place edit with a filter by broquaint
in thread command lineIn place edit with a filter by thesundayman

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