注册表函数问题

下面的代码运行不正确,弹出一串奇怪的字符, 如何解决,谢谢!!
    HKEY hKey;
    LPBYTE owner=new BYTE[80];
    DWORD type=REG_SZ ;
    DWORD cbData=80;

RegOpenKeyEx(HKEY_LOCAL_MACHINE,"SOFTWARE\Microsoft\Windows NT\CurrentVersion",0, KEY_READ,&hKey);
RegQueryValueEx(hKey,"RegisteredOwner",0,&type,owner,&cbData);
CString str=CString(owner);
AfxMessageBox(str);
RegCloseKey(hKey);