= GREp  [grep options] { * | file-spec }

        .Same parameter as native cmdline tool except on browse/edit screen.
         *\(currently opened dir) or ^*\(opened dir on the other split
         screen) notification is avail in file-spec.
        .On browse/edit screen, "*" file-spec parameter is used to
         search in current screen. Flagged line is searched by "F *G".
         On the other case,grep result is saved to temp file "::#go".
         On cmd result screen,::#go is displayed on the screen.
         (Note).grep search on current screen is currently supported
                only for the grep utility which display lineno on top
                of line with "nnn:" format if -n option specified.

                This function is yet remains,but use Find cmd with -g option.
                (No external process is generated).

               .On Linux,space embedding path name is troublesome,
                specify like as  <grep "a b.dir"/*.c>,
                <grep "a b.dir/*.c"> may fail.
         Find.exe cmd is available on Windows 10 as alternative of grep.
         Register cmd like as following.
            gre c:\Windows\System32\find.exe %1 %2 %3 %4
         Use it on =6 panel like s following. (Quotation is required for search word)
            gre /N /I "search-word" c:\user\srctext