what's system resource?and what can cause its level down?

thank u

[Jason Teagle]

It probably means memory for graphical items. It can go down by not properly matching calls to CreateXXX() & DeleteXXX() / DestroyXXX(), GetXXX() & ReleaseXXX(), etc. and by not selecting GDI objects out of DCs before destroying the DC (as you should).