动态创建菜单

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C/C++ code
void CMyF1Dlg::OnContextMenu(CWnd*  pWnd , CPoint  point ){    if (point.x == -1 && point.y == -1)    {        CRect rect;        GetClientRect(rect);        ClientToScreen(rect);        point = rect.TopLeft();        point.Offset(5, 5);    }    CMenu subMenu;                    subMenu.CreatePopupMenu();//创建一个子菜单    subMenu.InsertMenu( 0, MF_BYPOSITION, 4444, _T("E") );  //给子菜单添加项    subMenu.InsertMenu( 0, MF_BYPOSITION, 5555 ,_T("F") );     subMenu.InsertMenu( 0, MF_BYPOSITION, 6666 ,_T("G") );     subMenu.InsertMenu( 0, MF_BYPOSITION, 7777 ,_T("H") );    CMenu pMenu;    pMenu.CreatePopupMenu(); //创建一个主菜单    pMenu.AppendMenu( MF_STRING, 1111, _T("A") );  //给主菜单添加三个基本相    pMenu.AppendMenu( MF_STRING, 2222, _T("B") );     pMenu.AppendMenu( MF_STRING, 3333, _T("C") );    pMenu.AppendMenu( MF_POPUP,( UINT_PTR )subMenu.m_hMenu,_T( "M") ); //添加一个带弹出菜单的项    CWnd* pWndPopupOwner = this;    while ( pWndPopupOwner->GetStyle() & WS_CHILD ) pWndPopupOwner = pWndPopupOwner->GetParent();    pMenu.TrackPopupMenu( TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y, pWndPopupOwner );}