C/C++-Codebeispiel: Festlegen von Aufgabenkontoinformationen

In diesem Beispiel werden die Kontoinformationen für eine bekannte Aufgabe festgelegt. In diesem Beispiel wird davon ausgegangen, dass die Aufgabe "Testaufgabe" bereits auf dem lokalen Computer vorhanden ist und dass der Taskplanerdienst ausgeführt wird.

#define _WIN32_DCOM
#include <windows.h>
#include <initguid.h>
#include <iostream>
#include <stdio.h>
#include <comdef.h>
#include <wincred.h>
#include <ole2.h>
#include <mstask.h>
#include <msterr.h>
#include <wchar.h>

#pragma comment(lib, "comsupp.lib")
#pragma comment(lib, "credui.lib")


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 = CoInitializeEx(NULL, COINIT_MULTITHREADED);
  if (SUCCEEDED(hr))
  {
    hr = CoCreateInstance(CLSID_CTaskScheduler,
                          NULL,
                          CLSCTX_INPROC_SERVER,
                          IID_ITaskScheduler,
                          (void **) &pITS);
    if (FAILED(hr))
    {
      wprintf(L"Failed calling CoCreateInstance. ");
      CoUninitialize();
      return 1;
    }
  }
  else
  {
    wprintf(L"Failed calling CoInitializeEx. ");
    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;
  }
  
    //  ------------------------------------------------------
    //  Securely get the user name and password. 
    CREDUI_INFO cui;
    TCHAR pszName[CREDUI_MAX_USERNAME_LENGTH] = "";
    TCHAR pszPwd[CREDUI_MAX_PASSWORD_LENGTH] = "";
    BOOL fSave;
    DWORD dwErr;

    cui.cbSize = sizeof(CREDUI_INFO);
    cui.hwndParent = NULL;
    //  Ensure that MessageText and CaptionText identify
    //  what credentials to use and which application requires them.
    cui.pszMessageText = TEXT("Account information for task registration:");
    cui.pszCaptionText = TEXT("Enter Account Information for Task Registration");
    cui.hbmBanner = NULL;
    fSave = FALSE;

    //  Create the UI asking for the credentials.
    dwErr = CredUIPromptForCredentials(
        &cui,                             //  CREDUI_INFO structure
        TEXT(""),                         //  Target for credentials
        NULL,                             //  Reserved
        0,                                //  Reason
        pszName,                          //  User name
        CREDUI_MAX_USERNAME_LENGTH,       //  Max number for user name
        pszPwd,                           //  Password
        CREDUI_MAX_PASSWORD_LENGTH,       //  Max number for password
        &fSave,                           //  State of save check box
        CREDUI_FLAGS_GENERIC_CREDENTIALS |  //  Flags
        CREDUI_FLAGS_ALWAYS_SHOW_UI |
        CREDUI_FLAGS_DO_NOT_PERSIST);  

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

  ///////////////////////////////////////////////////////////////////
  // Call ITask::SetAccountInformation to specify the account name
  // and the account password for Test Task.
  ///////////////////////////////////////////////////////////////////
  hr = pITask->SetAccountInformation((LPCWSTR)pszName, 
            (LPCWSTR)pszPwd);

  SecureZeroMemory(pszName, sizeof(pszName));
  SecureZeroMemory(pszPwd, sizeof(pszPwd));
  
  if (FAILED(hr))
  {
    wprintf(L"Failed calling ITask::SetAccountInformation: ");
    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"Set the account name and password.");  
  CoUninitialize();
  return 0;
}

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