有关子线程向主线程发信息的问题

Question

在下面的代码中为什么最后一个PostMessage发不出去消息？

CITcard_test4Dlg *pDlg = cums;
    while(1)
    {  
    if(ring == false)
    {
    ::PostMessageW(pDlg->m_hWnd,UM_READDATA1,NULL,NULL);

    if(_T("RING") == CommstrTemp)
    {

        //char ad[6] = "????";
        pDlg->m_EditStatusBar=_T("您有一个来电！");

       //pDlg->m_EditStatusBar+=m_RxTIME+_T("\r\n");

        //pDlg->UpdateData(false);
      Callup = true;
    }
    ::PostMessageW(pDlg->m_hWnd,UM_READDATA1,NULL,NULL);
    if(-1 != CommstrTemp.Find(_T("+CMTI: \"SM\"")))
    {
         pDlg->m_EditStatusBar=_T("您有一条新短信！");
    }
    }
    //SetWindowText((HWND)pParam,NULL);
    ::PostMessageW(pDlg->m_hWnd,UM_STATUSSHOW,NULL,NULL);
    Sleep(100);
    }

求大神赐教！！！！！

Answer 1

https://www.cnblogs.com/annieBaby/p/4857031.html