C / C++ / MFC

<br />
	SC_HANDLE schService;<br />
    schService = CreateService( <br />
        schSCManager,              // SCManager database <br />
        lpszServiceName,              // name of service <br />
		lpszDisplayName,           // service name to display <br />
        SERVICE_ALL_ACCESS,        // desired access <br />
        SERVICE_WIN32_OWN_PROCESS| SERVICE_INTERACTIVE_PROCESS, // service type <br />
        SERVICE_DEMAND_START,      // start type <br />
        SERVICE_ERROR_NORMAL,      // error control type <br />
        lpszBinaryPathName,        // service's binary <br />
        NULL,                      // no load ordering group <br />
        NULL,                      // no tag identifier <br />
        NULL,                      // no dependencies <br />
        NULL,                      // LocalSystem account <br />
        NULL); // no password <br />

<br />
DWORD StartSampleService(SC_HANDLE schSCManager) <br />
{ <br />
    SERVICE_STATUS ssStatus; <br />
    DWORD dwOldCheckPoint; <br />
    DWORD dwStartTickCount;<br />
    DWORD dwWaitTime;<br />
    DWORD dwStatus;<br />
 	SC_HANDLE schService;<br />
	CString cstrMessage,cstrCaption;<br />
	cstrCaption="Service Message";<br />
<br />
	char ServiceName[50];<br />
	LPCTSTR lpszServiceName;<br />
	cout<<"Enter the Name of the service:      ";<br />
		cin>>ServiceName;<br />
	lpszServiceName=(LPCTSTR)ServiceName;<br />
<br />
<br />
schService = OpenService( <br />
	schSCManager,          // SCM database <br />
	lpszServiceName,          // service name Here I gave my sample service, Please change this<br />
	SERVICE_ALL_ACCESS);    //according to your wish.. see that the service is in not running currently. <br />
 <br />
    if (schService == NULL) <br />
    { <br />
		cstrMessage="OpenService";<br />
     //  MessageBox(NULL,cstrMessage,cstrCaption,NULL);<br />
	   cout<<"Error code "<<GetLastError()<<endl;<br />
    }<br />
 <br />
    if (!StartService(<br />
            schService,  // handle to service <br />
            0,           // number of arguments <br />
            NULL) )      // no arguments <br />
    {<br />
        	cstrMessage="OpenService";<br />
		//	MessageBox(NULL,cstrMessage,cstrCaption,NULL);<br />
			cout<<"Error code "<<GetLastError()<<endl;<br />
    }<br />
    else <br />
    {<br />
         <br />
			cstrMessage="Service start pending.\n";<br />
            //MessageBox(NULL,cstrMessage,cstrCaption,NULL);<br />
	    	cout<<"Error code "<<GetLastError()<<endl;<br />
    }<br />
 <br />
    // Check the status until the service is no longer start pending. <br />
 <br />
    if (!QueryServiceStatus( <br />
            schService,   // handle to service <br />
            &ssStatus) )  // address of status information structure<br />
    {<br />
        cout<<"QueryServiceStatus"<<endl; <br />
		cout<<"Error code "<<GetLastError()<<endl;<br />
    }<br />
 <br />
    // Save the tick count and initial checkpoint.<br />
<br />
    dwStartTickCount = GetTickCount();<br />
    dwOldCheckPoint = ssStatus.dwCheckPoint;<br />
<br />
    while (ssStatus.dwCurrentState == SERVICE_START_PENDING) <br />
    { <br />
        // Do not wait longer than the wait hint. A good interval is <br />
        // one tenth the wait hint, but no less than 1 second and no <br />
        // more than 10 seconds. <br />
 <br />
        dwWaitTime = ssStatus.dwWaitHint / 10;<br />
<br />
        if( dwWaitTime < 1000 )<br />
            dwWaitTime = 1000;<br />
        else if ( dwWaitTime > 10000 )<br />
            dwWaitTime = 10000;<br />
<br />
        Sleep( dwWaitTime );<br />
<br />
        // Check the status again. <br />
 <br />
        if (!QueryServiceStatus( <br />
                schService,   // handle to service <br />
                &ssStatus) )  // address of structure<br />
            break; <br />
 <br />
        if ( ssStatus.dwCheckPoint > dwOldCheckPoint )<br />
        {<br />
            // The service is making progress.<br />
<br />
            dwStartTickCount = GetTickCount();<br />
            dwOldCheckPoint = ssStatus.dwCheckPoint;<br />
        }<br />
        else<br />
        {<br />
            if(GetTickCount()-dwStartTickCount > ssStatus.dwWaitHint)<br />
            {<br />
                // No progress made within the wait hint<br />
                break;<br />
            }<br />
        }<br />
    } <br />
<br />
    if (ssStatus.dwCurrentState == SERVICE_RUNNING) <br />
    {<br />
	<br />
		cstrMessage="StartService SUCCESS.\n";<br />
	  // MessageBox(NULL,cstrMessage,cstrCaption,NULL);<br />
	 <br />
        dwStatus = NO_ERROR;<br />
    }<br />
    else <br />
    { <br />
       cstrMessage="\nService not started. \n";;<br />
	  // MessageBox(NULL,cstrMessage,cstrCaption,NULL);<br />
	   cout<<" Current State : "<<ssStatus.dwCurrentState<<endl; <br />
       cout<<"Exit Code: "<<ssStatus.dwWin32ExitCode<<endl; <br />
       cout<<" Service Specific Exit Code:"<<ssStatus.dwServiceSpecificExitCode<<endl; <br />
       cout<<"  Check Point: "<<ssStatus.dwCheckPoint<<endl; <br />
       cout<<" Wait Hint :"<<ssStatus.dwWaitHint<<endl; <br />
       dwStatus = GetLastError();<br />
    } <br />
 <br />
    CloseServiceHandle(schService); <br />
    return dwStatus;<br />
<br />
<br />
}<br />
<br />

// not tested 
  double fSomeTolerance = 0.0001;
  if ( fabs(vin - x) < fSomeTolerance )
  {
     ASSERT( 0 );
  }