1 put aeffect.h and aeffectx.h from the VST2.4 sdk here
3 download the vst sdk here:
4 http://www.steinberg.net/en/company/developer.html
6 these are the files you need:
8 /vstsdk2.4/pluginterfaces/vst2.x/aeffect.h
9 /vstsdk2.4/pluginterfaces/vst2.x/aeffectx.h