学习远控界面设计五: 在列表中显示弹出菜单

void CGhostDlg::OnNMRClickListoline(NMHDR *pNMHDR, LRESULT *pResult)
{
    LPNMITEMACTIVATE pNMItemActivate = reinterpret_cast<LPNMITEMACTIVATE>(pNMHDR);
    // TODO: Add your control notification handler code here
    CMenu    popup;
    popup.LoadMenu(IDR_MENU);
    CMenu*    pM = popup.GetSubMenu(0);
    CPoint    p;
    GetCursorPos(&p);
    int    count = pM->GetMenuItemCount();
    if (m_list_oline.GetSelectedCount() == 0)       //如果没有选中
    { 
        for (int i = 0; i < count; i++)
        {
            pM->EnableMenuItem(i, MF_BYPOSITION | MF_DISABLED | MF_GRAYED);          //菜单全部变灰
        }

    }
    pM->TrackPopupMenu(TPM_LEFTALIGN, p.x, p.y, this);
    *pResult = 0;
}