class Elf:public ENGINE{
    public:
    Elf(){
        check_by=CHECK_BY::CUSTOM;
        check_by_target=[](){
            //flutter of birds～鳥達の羽ばたき～
            //https://vndb.org/v2379
            //很奇怪，FindFirstFileW在win7上true，在win11上false，但PathFileExists在两者都是true
            auto paks={L"data.arc",L"effect.arc",L"mes.arc"};
            return  std::all_of(paks.begin(),paks.end(),[](auto f){return Util::CheckFile_exits(f,true);}) ;
        };
        //Util::CheckFile(L"Silkys.exe") ||    // It might or might not have Silkys.exe
      // data, effect, layer, mes, music
    }; 
     bool attach_function(); 
};

class Elf2:public ENGINE{
    public:
    Elf2(){
        
        check_by=CHECK_BY::FILE_ALL;
        check_by_target=check_by_list{L"data.arc",L"Ai5win.exe",L"mes.arc"}; 
    }; 
     bool attach_function(); 
};

class ElfFunClubFinal:public ENGINE{
    public:
    ElfFunClubFinal(){
        is_engine_certain=false;
        check_by=CHECK_BY::CUSTOM;
        check_by_target=[](){
            return wcscmp(processName_lower,L"fanclub.exe")==0;
        };
    }; 
     bool attach_function(); 
};