Thanks @Infinitum for you reply. I know I can open CW as a stand alone appication and connect it to GP through vertual midi loop app (but usually there will be some issues and not overly smooth and organic) compared to be under one VST host (especially GP) and have all VST plugins to connect as simple or complicated as you want. I want to use all extensive midi features within CW (to name a few: Step sequencer, Piano Roll, Event list editing, Arpeggiator, ....etc) and intigrate all of these all-in-one resources into live performance.