改变菜单勾选状态的方法

• 方案一

CMainFrame *pFrame = (CMainFrame *) AfxGetMainWnd(); CMenu *pMenu= pFrame->GetMenu();ASSERT(pMenu!=NULL);CMenu *subMenu  = pMenu->GetSubMenu(3);ASSERT(subMenu!=NULL);if(m_bShowCoordinate){subMenu->CheckMenuItem(ID_SHOW_COORDINATE, MF_CHECKED);}else{subMenu->CheckMenuItem(ID_SHOW_COORDINATE, MF_UNCHECKED);  } 

• 方案二

    在消息处理函数中进行处理：ON_UPDATE_COMMAND_UI(ID_SHOW_COORDINATE, OnUpdateShowCoordinate)

void CMyClass::OnUpdateShowCoordinate(CCmdUI * pCmdUI){    pCmdUI->SetCheck(m_bShowCoordinate);}