c++检测windows服务程序状态

代码如下：

TCHAR szSvcName[] = _TEXT("test");
SC_HANDLE schSCManager;
SC_HANDLE schService;

SERVICE_STATUS_PROCESS ssStatus;
DWORD dwOldCheckPoint;

DWORD dwStartTickCount;
DWORD dwWaitTime;
DWORD dwBytesNeeded;
// Get a handle to the SCM database.
schSCManager = OpenSCManager(
NULL,                    // local computer
NULL,                    // ServicesActive database
SC_MANAGER_ALL_ACCESS);  // full access rights
if (NULL == schSCManager)
{
printf("OpenSCManager failed (%d)\n", GetLastError());
}
// Get a handle to the service.
schService = OpenService(
schSCManager,         // SCM database
szSvcName,            // name of service
SERVICE_QUERY_STATUS |
SERVICE_ENUMERATE_DEPENDENTS
);  // full access
if (schService == NULL)
{
printf("OpenService failed (%d)\n", GetLastError());
CloseServiceHandle(schSCManager);

}
// Check the status in case the service is not stopped.
if (!QueryServiceStatusEx(
schService,                     // handle to service
SC_STATUS_PROCESS_INFO,         // information level
(LPBYTE) &ssStatus,             // address of structure
sizeof(SERVICE_STATUS_PROCESS), // size of structure
&dwBytesNeeded ) )              // size needed if buffer is too small
{
printf("QueryServiceStatusEx failed (%d)\n", GetLastError());
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
}
else
{
// Check if the service is already running. It would be possible
// to stop the service here, but for simplicity this example just returns.
printf("Service status: ");
switch(ssStatus.dwCurrentState)
{
case SERVICE_STOPPED:
case SERVICE_STOP_PENDING:
printf("Stop");
break;
case SERVICE_PAUSED:
case SERVICE_PAUSE_PENDING:
printf("Pause");
break;
case SERVICE_CONTINUE_PENDING:
case SERVICE_RUNNING:
case SERVICE_START_PENDING:
printf("Running");
break;
}
printf("\n");
}