> > This is all windows though. > Cross platform solution: Uses process ... p:=TProcess.Create(nil); {$IFDEF WIN32} p.CommandLine := 'cmd /c diff -r dir1 dir2 > diff.txt'; {$ENDIF} {$IFDEF LINUX} p.CommandLine := 'bash -c "diff -r dir1 dir2 > diff.txt"'; {$ENDIF} p.Execute; ... Ludo