MFC对象的动态创建 实例出错，求指导

#include <iostream.h>
#include <String.h>

class CObject;

struct Cruntimeclass
{
    char * classname;
    CObject * (_stdcall * m_pnfCreateObject)();
    CObject * _stdcall CreateObject();
};


class CObject
{
public:
    virtual bool sayhello(){return true;}

};


class myclass:public CObject
{
public:
    char * name;

public:
    myclass(){name="myclass";}
    static Cruntimeclass classMyclass;
    static Cruntimeclass * getRuntimeClass();
public:
    bool sayhello()
    {
        cout<<"hello me!"<<endl;
        return true;
    }

};

CObject * _stdcall CreateObject()
{
    return new myclass;
}

Cruntimeclass myclass::classMyclass={
    "myclass",
CreateObject};

Cruntimeclass * myclass::getRuntimeClass()
{
    return &myclass::classMyclass;
}

void main ()
{
    Cruntimeclass * p;
    p=myclass::getRuntimeClass();
    char inputClassName[10];
   
    cin>>inputClassName;

    if (!strcmp(inputClassName,p->classname))
    {
        p->CreateObject();
        CObject * _stdcall pp=p->m_pnfCreateObject();
        pp->sayhello();

    }
    else cout<<"no"<<endl;
}
错误提示如下：
--------------------Configuration: dynaCreat - Win32 Debug--------------------
Linking...
dynaCreat.obj : error LNK2001: unresolved external symbol "public: class CObject * __stdcall Cruntimeclass::CreateObject(void)" (?CreateObject@Cruntimeclass@@QAGPAVCObject@@XZ)
Debug/dynaCreat.exe : fatal error LNK1120: 1 unresolved externals
执行 link.exe 时出错.

dynaCreat.exe - 1 error(s), 0 warning(s)

表示看不太懂错误提示，是说"public: class CObject * __stdcall Cruntimeclass::CreateObject(void)" 无法识别吗？
还有一个不懂的地方，Cruntimeclass结构体生命中，若CObject * _stdcall CreateObject()去掉中间的 _stdcall则编译会提示，too many initializers这个又是怎么回事呢？
请高手指点！