can someone please tell me how i can make a program self executing i.e.
like a virus checker that comes on every four hours and seems to run
byitself
thanks
albi

If you want it to re-execute every four hours after it has been started
by the user, then make a companion program to start the program
every four hours and execute it with your program. If you want it to
execute by itself the first time, go to the registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
and add an entry for the companion program.

Or you could use the Task Scheduler if you want.

Or have the thing running all the time and put a countdown in your code.

Dale Atkin