在指定时间自动启动c ++应用程序 [英] Automatically start c++ application at specified time

问题描述

我想知道如何在没有任何用户干预的情况下使视觉c ++应用程序在指定时间自动启动。



我想做什么这在Windows环境中将在Visual Studio 11 Ultimate中开发c ++应用程序。

Hi, I want to know how can we make a visual c++ app to start automatically at a specified time, without any user intervention.

I want to do this in Windows environment and will be developing c++ app in Visual Studio 11 Ultimate.

推荐答案

你不能创建一个在特定时间开始的应用程序，因为应用程序必须已运行以检查时间。您可以让应用程序休眠直到特定时间过去（例如，使用 WaitForSingleObject（））。但这要求应用程序启动一次。



常见的解决方案是让 Windows任务计划程序 [ ^ ]启动你的应用。

You can''t make an app that starts itself at a specific time, because the app must already run to check the time. You can let your app sleep until a specific time has elapsed (e.g. using WaitForSingleObject()). But this requires that the app is started once.

The common solution is to let the Windows Task Scheduler[^] start your app.

使用任务计划程序



ref this http://msdn.microsoft.com/en-us/library/aa446828%28v=vs.85%29.aspx [ ^ ]

Use Task Scheduler

ref this http://msdn.microsoft.com/en-us/library/aa446828%28v=vs.85%29.aspx[^]

全部微软代码有一些错误。我找到了这个stackoverflow页面，请帮助：

The all microsoft codes had some bugs. I found this stackoverflow page, please help with this:

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


int main(int argc, char **argv)
{
  HRESULT hr = S_OK;
  ITaskScheduler *pITS;


  /////////////////////////////////////////////////////////////////
  // Call CoInitialize to initialize the COM library and then 
  // call CoCreateInstance to get the Task Scheduler object. 
  /////////////////////////////////////////////////////////////////
  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::NewWorkItem to create new task.
  /////////////////////////////////////////////////////////////////
  LPCWSTR pwszTaskName;
  ITask *pITask;
  IPersistFile *pIPersistFile;
  pwszTaskName = L"Test Task";

  hr = pITS->NewWorkItem(pwszTaskName,         // Name of task
                         CLSID_CTask,          // Class identifier 
                         IID_ITask,            // Interface identifier
                         (IUnknown**)&pITask); // Address of task 
                                                                                                                                                                                            //  interface


  pITS->Release();                               // Release object
  if (FAILED(hr))
  {
     CoUninitialize();
     fprintf(stderr, "Failed calling NewWorkItem, error = 0x%x\n",hr);
     return 1;
  }

  /////////////////////////////////////////////////////////////////
  //Set Comment, Name, Working dir, Params
  /////////////////////////////////////////////////////////////////
  pITask->SetComment(L"This is a comment");
  pITask->SetApplicationName(L"C:\\Windows\\System32\\notepad.exe");
  pITask->SetWorkingDirectory(L"C:\\Windows\\System32");
  pITask->SetParameters(L"");

  ///////////////////////////////////////////////////////////////////
  // Call ITask::CreateTrigger to create new trigger.
  ///////////////////////////////////////////////////////////////////

  ITaskTrigger *pITaskTrigger;
  WORD piNewTrigger;
  hr = pITask->CreateTrigger(&piNewTrigger,
                             &pITaskTrigger);
  if (FAILED(hr))
  {
    wprintf(L"Failed calling ITask::CreatTrigger: ");
    wprintf(L"error = 0x%x\n",hr);
    pITask->Release();
    CoUninitialize();
    return 1;
  }

//////////////////////////////////////////////////////
  // Define TASK_TRIGGER structure. Note that wBeginDay,
  // wBeginMonth, and wBeginYear must be set to a valid 
  // day, month, and year respectively.
  //////////////////////////////////////////////////////

  TASK_TRIGGER pTrigger;
  ZeroMemory(&pTrigger, sizeof (TASK_TRIGGER));

  LPSYSTEMTIME lpSystemTime;
  GetLocalTime(lpSystemTime);


  // Add code to set trigger structure?
  pTrigger.wBeginDay = lpSystemTime->wDay;                  // Required
  pTrigger.wBeginMonth = lpSystemTime->wMonth;                // Required
  pTrigger.wBeginYear =lpSystemTime->wYear;              // Required
  pTrigger.cbTriggerSize = sizeof (TASK_TRIGGER); 
  pTrigger.wStartHour = lpSystemTime->wHour;
  pTrigger.wStartMinute = lpSystemTime->wMinute + 2;
  pTrigger.TriggerType = TASK_TIME_TRIGGER_DAILY;
  pTrigger.Type.Daily.DaysInterval = 1;


  ///////////////////////////////////////////////////////////////////
  // Call ITaskTrigger::SetTrigger to set trigger criteria.
  ///////////////////////////////////////////////////////////////////

  hr = pITaskTrigger->SetTrigger (&pTrigger);
  if (FAILED(hr))
  {
    wprintf(L"Failed calling ITaskTrigger::SetTrigger: ");
    wprintf(L"error = 0x%x\n",hr);
    pITask->Release();
    pITaskTrigger->Release();
    CoUninitialize();
    return 1;
  }




  /////////////////////////////////////////////////////////////////
  // Call IUnknown::QueryInterface to get a pointer to 
  // IPersistFile and IPersistFile::Save to save 
  // the new task to disk.
  /////////////////////////////////////////////////////////////////

  hr = pITask->QueryInterface(IID_IPersistFile,
                              (void **)&pIPersistFile);

  pITask->Release();
  if (FAILED(hr))
  {
     CoUninitialize();
     fprintf(stderr, "Failed calling QueryInterface, error = 0x%x\n",hr);
     return 1;
  }


  hr = pIPersistFile->Save(NULL,
                           TRUE);
  pIPersistFile->Release();
  if (FAILED(hr))
  {
     CoUninitialize();
     fprintf(stderr, "Failed calling Save, error = 0x%x\n",hr);
     return 1;
  }


  CoUninitialize();
  printf("Created task.\n");
  return 0;
}</stdio.h></wchar.h></objidl.h></msterr.h></mstask.h></ole2.h></initguid.h></windows.h>

该人说添加后：

The person says that after adding:

<pre lang="c++">pITask->SetFlags(TASK_FLAG_RUN_ONLY_IF_LOGGED_ON);

和此：

and this:

hr = pITask->SetAccountInformation(L"", 
            NULL);


  if (FAILED(hr))
  {
    wprintf(L"Failed calling ITask::SetAccountInformation: ");
    wprintf(L"error = 0x%x\n",hr);
    pITask->Release();
    CoUninitialize();
    return 1;
  }

代码有效。有人能告诉我在哪里添加这些代码吗？我最后添加了它们但得到了错误：LPSYSTEMTIME在没有初始化的情况下使用

the code works. Can someone tell me where to add these codes? I added them at last but got the error: LPSYSTEMTIME used without initializing

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