Esempio di codice C/C++: Impostazione della priorità dell'attività
In questo esempio viene impostata la priorità di un'attività di test e quindi viene salvata l'attività. In questo esempio si presuppone che l'attività di test esista già nel computer locale.
#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::SetPriority to specify the priority level of
// Test Task.
///////////////////////////////////////////////////////////////////
DWORD dwPriority = HIGH_PRIORITY_CLASS;
hr = pITask->SetPriority(dwPriority);
if (FAILED(hr))
{
wprintf(L"Failed calling ITask::SetPriority: ");
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 priority of TestTask to HIGH_PRIORITY_CLASS.\n");
CoUninitialize();
return 0;
}
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