Edit

Share via

C/C++ Code Example: Retrieving the Task NextRun Time

  • Article

This example retrieves the next time the task is scheduled to run and displays that time on the screen. This example assumes that the task and the test task already exist on the local computer.

#include <windows.h>
#include <wchar.h>
#include <stdio.h>
#include <initguid.h>
#include <ole2.h>
#include <mstask.h>
#include <msterr.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 = L"Test Task";
  hr = pITS->Activate(lpcwszTaskName,
                      IID_ITask,
                      (IUnknown**) &pITask);
  
  // Release 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::GetNextRunTime and display next run time of 
  // this task.
  ///////////////////////////////////////////////////////////////////

  SYSTEMTIME pstNextRun;
    
  hr = pITask->GetNextRunTime(&pstNextRun);
  
  // Release the ITask interface.
  pITask->Release();

  if (FAILED(hr))
  {
    wprintf(L"Failed calling GetNextRunTime: ");
    wprintf(L"error = 0x%x\n", hr);
    CoUninitialize();
    return 1;
  }

  wprintf(L"The next runtime for this task is: \n");
  wprintf(L"  %u/%u/%u \t %u:%02u\n", pstNextRun.wMonth,
                                      pstNextRun.wDay,
                                      pstNextRun.wYear,
                                      pstNextRun.wHour,
                                      pstNextRun.wMinute);
 

  CoUninitialize();

  return 0;
}

Task Scheduler 1.0 Examples