ListControl響應右鍵，彈出菜單

void CTHREADDLG::OnRclickList(NMHDR* pNMHDR, LRESULT* pResult) 
{
    //獲取鼠標坐標
    CPoint ptCurSel(0,0);
    GetCursorPos(&ptCurSel);
    //轉換為當前控件坐標系的坐標
    m_ctltThreadList.ScreenToClient(&ptCurSel);
    LVHITTESTINFO HitTestInfo;
    HitTestInfo.pt = ptCurSel;   
    //判斷坐標命中第幾項
    int nItem = m_ctltThreadList.HitTest(&HitTestInfo);
    
    //如果有選中項
    if (nItem != -1)
    {
        //讀取選中項內容
        char szTmp[MAX_PATH];
        m_ctltThreadList.GetItemText(nItem, 0, szTmp, MAX_PATH);
        DWORD dwThreadID = strtoul(szTmp, NULL, 10);

        HMODULE hDll = LoadLibrary("Kernel32.dll");
        _OPENTHREAD OpenThread = (_OPENTHREAD)GetProcAddress(hDll, "OpenThread");
        m_hThread = OpenThread(THREAD_ALL_ACCESS, FALSE, dwThreadID);

        //彈出菜單
        CMenu menu;
        menu.LoadMenu(IDR_THREAD_MENU);
        CPoint point;
        GetCursorPos(&point);
        CMenu* pSubMenu = menu.GetSubMenu(0);
        pSubMenu->TrackPopupMenu(TPM_LEFTALIGN, point.x, point.y, this);        
    }
    
    *pResult = 0;
}