帮看看代码有没有关问题，程序调试老出错，发现与一下代码有关，去掉就不会出错

帮看看代码有没问题，程序调试老出错，发现与一下代码有关，去掉就不会出错
//初始化数据库连接
CADODatabase   cDBConnnect;  
CString   strDSN   =   _T( "DSN=YYTDSQL;UID=yytd;PWD=yytd1234 ");
cDBConnnect.SetConnectionString(   strDSN   );
cDBConnnect.SetConnectionMode(CADODatabase::connectModeReadWrite);

if(!cDBConnnect.Open())
{
        return;

}


--------------------------------
First-chance   exception   in   fileBatcher.exe:   0xC0000005:   Access   Violation.

------解决方案--------------------
CADODatabase
//怎么定义的？