IDHANDLEHWND三者之间的互相转换

ID--HANDLE--HWND三者之间的互相转换
id->句柄-----------hWnd = ::GetDlgItem(hParentWnd,id);
id->指针-----------CWnd::GetDlgItem();
句柄->id-----------id = GetWindowLong(hWnd,GWL_ID);
句柄->指针--------CWnd *pWnd=CWnd::FromHandle(hWnd);
指针->ID----------id = GetWindowLong(pWnd->GetSafeHwnd,GWL_ID);
                                            GetDlgCtrlID();
指针->句柄--------hWnd=cWnd.GetSafeHandle() or mywnd->m_hWnd;