system resources problem

Hi,

I made a resident app that this way has to be running all the time, and so
it must take the fewest system resources as possible. Unfortunatly, mine
takes about 15 % up to 20% in some cases. I made the forms not autocreated,
and this made me get few % off but the problem is still there. Could you
tell me what exactly in a program takes those resources, so I could try to
solve it. Or maybe there is a way to release some resources if the app is
not used for a certain periode of time

Thanks a lot

Thomas