拜託大大幫忙解讀一下這3行程式, MFC (初步)

就單行的描述說明,
CRuntimeClass* CRuntimeClass::pFirstClass = NULL;

令 CRuntimeClass 裡面的指標 pFirstClass 為NULL ?
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static CObject* PASCAL CreateObject();

宣告一個靜態物件指標 , 名稱為 PASCAL ?? CreateObject() ??
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CObject* PASCAL CFrameWnd::CreateObject() { return new CFrameWnd; }

定義 PASCAL裡面的CreateObject 函式, 傳回一個新建立的物件 , 其型態為 CFrameWnd ,
不懂為什麼前面要加 CObject* ??








補充說明:
struct CRuntimeClass
{
// Attributes
LPCSTR m_lpszClassName;
int m_nObjectSize;
UINT m_wSchema; // schema number of the loaded class
CObject* (PASCAL* m_pfnCreateObject)(); // NULL => abstract class
CRuntimeClass* m_pBaseClass;
CObject* CreateObject();
static CRuntimeClass* PASCAL Load();
// CRuntimeClass objects linked together in simple list
static CRuntimeClass* pFirstClass; // start of class list
CRuntimeClass* m_pNextClass; // linked list of registered classes
};


感謝~~~