C / C++ / MFC

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DWORD StartSampleService() <br />
{ <br />
    SERVICE_STATUS ssStatus; <br />
    DWORD dwOldCheckPoint; <br />
    DWORD dwStartTickCount;<br />
    DWORD dwWaitTime;<br />
    DWORD dwStatus;<br />
 <br />
    schService = OpenService( <br />
        schSCManager,          // SCM database <br />
        "Sample_Srv",          // service name<br />
        SERVICE_ALL_ACCESS); <br />
 <br />
    if (schService == NULL) <br />
    { <br />
        MyErrorExit("OpenService"); <br />
    }<br />
 <br />
    if (!StartService(<br />
            schService,  // handle to service <br />
            0,           // number of arguments <br />
            NULL) )      // no arguments <br />
    {<br />
        MyErrorExit("StartService"); <br />
    }<br />
    else <br />
    {<br />
        printf("Service start pending.\n"); <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 />
        MyErrorExit("QueryServiceStatus"); <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 />
        printf("StartService SUCCESS.\n"); <br />
        dwStatus = NO_ERROR;<br />
    }<br />
    else <br />
    { <br />
        printf("\nService not started. \n");<br />
        printf("  Current State: %d\n", ssStatus.dwCurrentState); <br />
        printf("  Exit Code: %d\n", ssStatus.dwWin32ExitCode); <br />
        printf("  Service Specific Exit Code: %d\n", <br />
            ssStatus.dwServiceSpecificExitCode); <br />
        printf("  Check Point: %d\n", ssStatus.dwCheckPoint); <br />
        printf("  Wait Hint: %d\n", ssStatus.dwWaitHint); <br />
        dwStatus = GetLastError();<br />
    } <br />
 <br />
    CloseServiceHandle(schService); <br />
    return dwStatus;<br />
}