hi jgcode,
thanks for your reply.
i tryied your solution but i couldn't managed it. ( The next step is to build a circular buffer" i couldn't understand, what does it means "circular buffer"?? :s )
after i tryied other solution and i saw signals.
the last problem about program,
The program can't save the "coefficent" and "plus" number. can i save this number. i don't want to write it everytime when i open the program
i hope i'll solve that problem.
again, thanks for everything...
hakan...