client2b.cpp

VC++串口通信设。本书详细说明讲解了在VC++环境下编写串口通信得过程。值得一看

#include <iostream>
#define INITGUID
#include "Utility.h"
#include "IFortune.h"

int main()
{
   HRESULT          hResult;
   IFortuneTeller   *pIFortuneTeller;
   BSTR             bstrFortune;
   LPSTR            pszFortune;

   cout << "Fortune2 - Simple COM Fortune Client Program\n";

   // Prepare COM for use
   VerboseMsg("Calling COM API CoInitialize.\n");
   hResult = CoInitialize(NULL);
   if (FAILED(hResult)) {
      ReportError("Could not initialize COM.", hResult);
      return 1;
   }

   // Create a new FortuneTeller object and return an IFortuneTeller
   // interface pointer
   VerboseMsg("Creating new FortuneTeller object instance.\n");
   hResult = CoCreateInstance(CLSID_FortuneTeller2,
                              NULL, CLSCTX_INPROC_SERVER,
                              IID_IFortuneTeller,
                              (PPVOID) &pIFortuneTeller);
   if (FAILED(hResult)) {
      ReportError("Could not create a new FortuneTeller object.", hResult);
      return 1;
   }

   // Get our fortune, in BSTR form
   VerboseMsg("Getting fortune from FortuneTeller object.\n");
   pIFortuneTeller->GetFortune(&bstrFortune);

   // Convert the fortune into a regular string
   VerboseMsg("Translating fortune from Unicode to ANSI text.\n");
   UnicodeToAnsi(bstrFortune, &pszFortune);

   // Show the user the fortune
   cout << "\"" << pszFortune << "\"" << endl;

   // Release the memory for both the ANSI string and the BSTR
   VerboseMsg("Releasing fortune and BSTR strings.\n");
   CoTaskMemFree(pszFortune);
   SysFreeString(bstrFortune);

   // We're done with the FortuneTeller object
   VerboseMsg("Releasing FortuneTeller object.\n");
   pIFortuneTeller->Release();
   pIFortuneTeller = NULL;

   // We're all done with COM
   CoUninitialize();

   return 0;
}