PostThreadMessage  <==> Thread Message Map:: ON_THREAD_MESSAGE

因為 CWinApp 繼承 CWinThread
// in CxxxApp.h
class CxxxApp.h: public CWinApp
{
public:
	CkkkApp();

// 覆寫
	public:
	virtual BOOL InitInstance();
	void  GoBabyGo(WPARAM wP, LPARAM lP); // <<< --- 加入 prototype

// 程式碼實作

	DECLARE_MESSAGE_MAP()
};

// in CxxxApp.cpp
在 CxxxApp class 的 Message-Loop 加上 ON_THREAD_MESSAGE(WM_USER+1,GoBabyGo)
BEGIN_MESSAGE_MAP(CkkkApp, CWinApp)
	ON_COMMAND(ID_HELP, CWinApp::OnHelp)
	ON_THREAD_MESSAGE(WM_USER+1,GoBabyGo)
END_MESSAGE_MAP()

void  CxxxApp::GoBabyGo(WPARAM wP, LPARAM lParam){
	int y=HIWORD(lParam);
	int x=LOWORD(lParam);
}
















參考資料:
#define WM_THR_CANCEL	       WM_APP+3
#define WM_THR_START	       WM_APP+6



class CMyThread : public CWinThread  
{
  DECLARE_DYNCREATE(CMyThread)
public:
	void OnEnd();
	CWnd * m_pWnd;
	CMyThread();
	virtual ~CMyThread();

	void SetWindow(CWnd * wnd);
  BOOL CMyThread::InitInstance();
  int CMyThread::ExitInstance();
protected:
  DECLARE_MESSAGE_MAP()
private:
	void OnUpdateStatus(WPARAM wP, LPARAM lP);
	void GoBabyGo();

};

IMPLEMENT_DYNCREATE(CMyThread, CWinThread)
CMyThread::CMyThread()
{
   m_pWnd=NULL;
}

CMyThread::~CMyThread()
{

}

BOOL CMyThread::InitInstance()
{
	return TRUE;
}

int CMyThread::ExitInstance()
{
	return CMyThread::ExitInstance();
}
/************************************************************************ 
* Add message maps telling the procedures what to do when the
* certain messages are received from the windows queue.
************************************************************************/

BEGIN_MESSAGE_MAP(CMyThread, CWinThread)

	ON_THREAD_MESSAGE(WM_THR_START,GoBabyGo) 
	ON_THREAD_MESSAGE(WM_THR_CANCEL,OnEnd)

END_MESSAGE_MAP()
void CMyThread::GoBabyGo(){
}
void CMyThread::OnEnd(){
}