can somebody explain to me (a lisp beginner) how to modify the find-grep
default string ??

the default is:
 find . -type f -print0 | "xargs" -0 -e grep -nH -e

i would like something like :

 find ..  -name "*.cxx"   -print0 | "xargs" -0 -e grep -inH -e


thanks in advance
Robert Somerville