Hi, I have set mulitiple instances in my MFC application. It's normarl while beginning,but when I made them quit ,the app crash!!!! who knows? //create vlc for (int i=0;i<vlcCount;i++) { memset(temp,0,sizeof(temp)); sprintf_s(temp,10,"%d",(i+1)); vlc[i] = NULL; vlc[i] = new CVlcplugin1; //...