回調函數的使用 CallBack

typedef void (CALLBACK *CallBackFun)(void *pOwner);


class CDirectButton  
{  
public:  
    void SetCallBackFun(CallBackFun Fun){m_CallBackFun=Fun;}  
private:  
    void * m_ParentWnd;//父視窗c++對象的指針  
  
  
    CallBackFun m_CallBackFun ;   
};


void CDirectButton::OnLButtonUp( CPoint point )  
{  
    if (m_DrawRect.PtInRect(point))  
    {  
        m_CallBackFun(m_ParentWnd);  
    }  
    else  
    {  
        n_ButtonState=Normal ;  
    }  
}




CDirectButton * pButton1=new CDirectButton ;  
pButton1->SetCallBackFun(CallBackSettingButton);


class CDlgWeather : public CDialog  
{ 
    public:
	static void CALLBACK CallBackSettingButton(void * pWnd);
};


void CDlgWeather::CallBackSettingButton( void * pWnd )  
{  
    CDlgWeather * pDlgWeather= (CDlgWeather *)pWnd ;    
    pDlgWeather->m_IspressSetting=FALSE;    
    ::SendMessage(pDlgWeather->m_hMainWnd,WM_SHOW_SETDLG,0,0);  
    pDlgWeather->m_IspressSetting=TRUE;  
    pDlgWeather->m_bIsTracking=FALSE;  
  
}