如何克服阻碍第三方的功能

我在Win32应用程序中使用了一些第三方功能（hrmcom.dll）。我有一个带有winproc和3个子窗口的主windowclass，所有第二个共享一个childproc的windowclass。对第三方函数的调用是在一个子窗口中进行的，并在子进程中基于WM_COMMAND进行处理（按下按钮并调用函数）。

这些功能之一是阻止。它建立了与IrDA设备的连接，当该设备不存在且处于连接模式时会“挂起”。我想通过通话超时来解决这种情况。

我尝试的是在阻塞调用之前调用SetTimer（在与阻塞函数所在的窗口相同的窗口中调用）并定义WM_TIMER句柄。这是行不通的，调试表明该函数已挂起，并且从未处理WM_TIMER事件。我试图调用主窗口的计时器，但这也无法正常工作。

我看到了此DLL的工作示例，其中使用一个按钮来启动和取消与设备的连接过程。

问题：当悬吊功能未连接到设备时，如何处理并在X秒后将其超时？我一直在阅读有关线程的内容，但我想知道它是否真的只能完成那么复杂的工作（到目前为止，我还无法使线程正常工作）。

以下是被调用函数的头文件部分，如果有帮助的话：

__declspec (dllexport) BOOL CALLBACK fnHRMCom_StartIRCommunication  (int, LPTSTR);

//  Return value:
//  BOOL bStartOK
//   TRUE           - Starting of communication made succesfully
//   FALSE          - Problems encountered, check the following possible   errors:
//                      * Communication has already been started and it is running
//                      * Communication port already reserved for some other device
//                      * Maybe call was made from 16-bit program. A 32-bit DLL cannot
//                        create an additional thread when that DLL is being called by
//                        a 16-bit program.
//
///////////////////////////////////////////////////////////////////////////////

包含的最新代码：线程函数（简体）：

VOID Thread(PVOID pvoid)
{
volatile PPARAMS pparams;
pparams = (PPARAMS) pvoid;

if (pparams->bContinue)
{

    if (!fnHRMCom_ResetIRCommunication(0))
    {
        // Resetting IR connection was not successful
        ErrMsg(L"Resetting IR connection was not successful");
        return;
    }
    if (!fnHRMCom_StartIRCommunication(HRMCOM_PARAM_IRDA, L"IR"))
    {
        // IrDA couldn't be opened, stop connection thread
        fnHRMCom_EndIRCommunication(FALSE);
        ErrMsg(L"IrDA couldn't be opened, connection thread stopped");
        return;
    }
    //Status report "IR Communication started"
    SetWindowText(hwndCtrl[11], L"Status: IR Communication started");

    if (!fnHRMCom_ReadMonitorInfo(&psg, &psmi))
    {
        // Reading failed, close connection
        if (pparams->bContinue)
        {
            fnHRMCom_EndIRCommunication(FALSE);
            ErrMsg(L"Reading failed, connection closed01");
            SendMessage(hwndCtrl[8], LB_RESETCONTENT, 0, 0);
            return;
        }
        else
        {
            fnHRMCom_EndIRCommunication(FALSE);
            ErrMsg(L"Connection aborted, connection closed");
            SendMessage(hwndCtrl[8], LB_RESETCONTENT, 0, 0);
            return;
        }
    }

    }
    // End IR communication
    fnHRMCom_EndIRCommunication(FALSE);
}
_endthread();


}

用于手动调用和取消线程的代码：

case (ID_CTRL + 12) : 
        //Cancel connect to device
        params.bContinue = FALSE;           
        if (!fnHRMCom_EndIRCommunication(FALSE))
        {
            //TODO: Error
            return 0;
        }
        TerminateThread(hThread, 0);    
        return 0;       
    case (ID_CTRL + 7) : 
        //Load Activities from Device
        params.bContinue = TRUE;
        if (IDCANCEL != MessageBox(hwnd, L"Make sure your device is set to connectmode", L"Warning", MB_OKCANCEL | MB_ICONEXCLAMATION))
        {
            //Start downloading the activities in separate thread
            SetTimer(hwnd, IDT_TIMER1, 10000, NULL );
            hThread = (HANDLE)_beginthread(Thread, 0, &params);
        }
        //cancelled, dont start the IrDA connection thread      
        return 0;

以及计时器处理程序的代码：

case WM_TIMER:
    if (LOWORD(wParam) == IDT_TIMER1)
    {
        if (!fnHRMCom_IsIrDAConnected())
        {
            SetWindowText(hwndCtrl[11], L"Status: IrDA connection timed out");
            TerminateThread(hThread, 0);
            fnHRMCom_EndIRCommunication(FALSE);
            KillTimer(hwnd, IDT_TIMER1);                
            ErrMsg(L"IrDA connection timed out");               
            return 0;
        }
        else KillTimer(hwnd, IDT_TIMER1);
    }
    return 0;