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Voorbeeld van C/C++-code: Taakparameters instellen

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In dit voorbeeld worden alle opdrachtregelparameters gewist die zijn gekoppeld aan een bekende taak. In dit voorbeeld wordt ervan uitgegaan dat de taak en de testtaak al bestaan op de lokale computer.

#include <windows.h>
#include <initguid.h>
#include <ole2.h>
#include <mstask.h>
#include <msterr.h>
#include <wchar.h>


int main(int argc, char **argv)
{
  HRESULT hr = S_OK;
  
  ///////////////////////////////////////////////////////////////////
  // Call CoInitialize to initialize the COM library and then
  // call CoCreateInstance to get the Task Scheduler object.
  ///////////////////////////////////////////////////////////////////
  ITaskScheduler *pITS;
  
  hr = CoInitialize(NULL);
  if (SUCCEEDED(hr))
  {
    hr = CoCreateInstance(CLSID_CTaskScheduler,
                          NULL,
                          CLSCTX_INPROC_SERVER,
                          IID_ITaskScheduler,
                          (void **) &pITS);
    if (FAILED(hr))
    {
      CoUninitialize();
      return 1;
    }
  }
  else
  {
    return 1;
  }
  
  
  ///////////////////////////////////////////////////////////////////
  // Call ITaskScheduler::Activate to get the Task object.
  ///////////////////////////////////////////////////////////////////
  ITask *pITask;
  LPCWSTR lpcwszTaskName;
  lpcwszTaskName = L"Test Task";
  hr = pITS->Activate(lpcwszTaskName,
                      IID_ITask,
                     (IUnknown**) &pITask);
  
  // Release the ITaskScheduler interface.
  pITS->Release();  
  
  if (FAILED(hr))
  {
    wprintf(L"Failed calling ITaskScheduler::Activate: ");
    wprintf(L"error = 0x%x\n",hr);
    CoUninitialize();
    return 1;
  }
  
  
  ///////////////////////////////////////////////////////////////////
  // Call ITask::SetParameters to L"" to clear the parameters for
  // Test Task.
  ///////////////////////////////////////////////////////////////////
  LPCWSTR pwszParameters = L"";
  
  hr = pITask->SetParameters(pwszParameters);

  if (FAILED(hr))
  {
    wprintf(L"Failed calling ITask::SetParameters: ");
    wprintf(L"error = 0x%x\n",hr);
    pITask->Release();
    CoUninitialize();
    return 1;
  }
  
  
  ///////////////////////////////////////////////////////////////////
  // Call IPersistFile::Save to save the modified task to disk.
  ///////////////////////////////////////////////////////////////////
  IPersistFile *pIPersistFile;
  
  hr = pITask->QueryInterface(IID_IPersistFile,
                              (void **)&pIPersistFile);
  
  // Release the ITask interface.
  pITask->Release();  
  
  hr = pIPersistFile->Save(NULL,
                           TRUE);
  
  if (FAILED(hr))
  {
    wprintf(L"Failed calling IPersistFile::Save: ");
    wprintf(L"error = 0x%x\n",hr);
    pIPersistFile->Release();
    CoUninitialize();
    return 1;
  }

  // Release the IPersistFile interface.
  pIPersistFile->Release();
  
  wprintf(L"Cleared the parameters of TestTask.\n");
  
  CoUninitialize();
  return 0;
}

Task Scheduler 1.0-voorbeelden