yes i we talk about fx_demo and the demo.dsw . i used bundled fx_demo folder without changes. rather i wanted modify the kxm 120 (midi kbu) with possibility playing legato and polyphonic keys, triggering gate correctly. the idea was a simple key- counter with increment and decrement if "note on" or "note off" message arrives.. no luck at compling it. so i thought: try the fx_demo to check the compiler itself before searching the error in my own code kxm120.. i think about reinstalling vc6.