服務(wù)創(chuàng)建步驟

1. 設(shè)置服務(wù)入口函數(shù)ServiceMain,
   StartServiceCtrlDispatcher
2. 注冊服務(wù)控制處理器念秧，接收SCM的命令强霎。
   RegisterServiceCtrlHandler
3. 服務(wù)執(zhí)行，等待停止膏燃，反饋狀態(tài)刷允。

代碼

#define SERVICE_NAME _T("MyXzmService")
#define LOGFILE _T("E:\\memstatus.txt")

SERVICE_STATUS ServiceStatus;
SERVICE_STATUS_HANDLE hStatus;

void WINAPI ServiceMain(int argc, char** argv);
void ControlHandler(DWORD request);
int WriteToLog(TCHAR *str);
int InitService();

// 文章： https://blog.csdn.net/nodeathphoenix/article/details/24181509
int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPTSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);
    OutputDebugString(_T("-------_tWinMain--------"));

    SERVICE_TABLE_ENTRY ServiceTable[2];
    ServiceTable[0].lpServiceName = SERVICE_NAME;   // 指向表示服務(wù)名稱字符串的指針；當(dāng)定義了多個(gè)服務(wù)時(shí)奶躯，那么這個(gè)域必須指定； 
    ServiceTable[0].lpServiceProc = (LPSERVICE_MAIN_FUNCTION)ServiceMain;               // 指向服務(wù)主函數(shù)的指針（服務(wù)入口點(diǎn)）亿驾； 

    ServiceTable[1].lpServiceName = NULL;
    ServiceTable[1].lpServiceProc = NULL;

    StartServiceCtrlDispatcher(ServiceTable);
    return 0;
}

// 該函數(shù)是服務(wù)的入口點(diǎn)嘹黔。它運(yùn)行在一個(gè)單獨(dú)的線程當(dāng)中，這個(gè)線程是由控制分派器創(chuàng)建的
void WINAPI ServiceMain(int argc, char** argv){
    OutputDebugString(_T("ServiceMain start"));
    ServiceStatus.dwServiceType = SERVICE_WIN32;            // 指示服務(wù)類型颊乘，創(chuàng)建 Win32 服務(wù)参淹。賦值 SERVICE_WIN32 ； 
    ServiceStatus.dwCurrentState = SERVICE_START_PENDING;   // 指定服務(wù)的當(dāng)前狀態(tài)
    ServiceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;   // 這個(gè)域通知 SCM 服務(wù)接受哪個(gè)域
    ServiceStatus.dwWin32ExitCode = 0;
    ServiceStatus.dwCheckPoint = 0;
    ServiceStatus.dwWaitHint = 0;

    // 為服務(wù)注冊控制處理器,兩個(gè)參數(shù)傳遞給此函數(shù)：服務(wù)名和指向 ControlHandlerfunction 的指針乏悄。 
    // 注冊完控制處理器之后浙值，獲得狀態(tài)句柄（hStatus）。通過調(diào)用 SetServiceStatus 函數(shù)檩小，用 hStatus 向 SCM 報(bào)告服務(wù)的狀態(tài)开呐。 
    hStatus = RegisterServiceCtrlHandler(SERVICE_NAME, (LPHANDLER_FUNCTION)ControlHandler);
    if (hStatus == (SERVICE_STATUS_HANDLE)0)
    {
        // Registering Controll Handler failed;
        return;
    }
    OutputDebugString(_T("ServiceMain InitService"));
    int error = InitService();
    if (error)
    {
        OutputDebugString(_T("ServiceMain InitService fail."));
        // 初始化失敗，終止服務(wù)
        ServiceStatus.dwCurrentState = SERVICE_STOPPED;
        ServiceStatus.dwWin32ExitCode = -1;
        SetServiceStatus(hStatus, &ServiceStatus);
        // 退出ServiceMan
        return;
    }
    ServiceStatus.dwCurrentState = SERVICE_RUNNING;
    SetServiceStatus(hStatus, &ServiceStatus);

    //  
    // 不斷獲取內(nèi)存大小寫入文件
    while (ServiceStatus.dwCurrentState == SERVICE_RUNNING)
    {
        TCHAR buffer[100];
        MEMORYSTATUS memory;
        GlobalMemoryStatus(&memory);
        _stprintf_s(buffer, _T("memory.dwAvailPhys=%d"), memory.dwAvailPhys);
        int result = WriteToLog(buffer);
        if (result)
        {
            ServiceStatus.dwCurrentState = SERVICE_STOPPED;
            ServiceStatus.dwWin32ExitCode = -1;
            SetServiceStatus(hStatus, &ServiceStatus);
            return;
        }

        // 等待10s
        Sleep(10000);
    }
}

void ControlHandler(DWORD request){
    switch (request)
    {
    case SERVICE_CONTROL_STOP:
        WriteToLog(_T("Monitoring stoppend."));
        ServiceStatus.dwCurrentState = SERVICE_STOPPED;
        ServiceStatus.dwWin32ExitCode = 0;
        SetServiceStatus(hStatus, &ServiceStatus);
        break;
    case SERVICE_CONTROL_SHUTDOWN:
        WriteToLog(_T("Monitoring shutdown."));
        ServiceStatus.dwCurrentState = SERVICE_STOPPED;
        ServiceStatus.dwWin32ExitCode = 0;
        SetServiceStatus(hStatus, &ServiceStatus);
        break;
    default:
        break;
    }
}

int InitService(){
    int result;
    result = WriteToLog(_T("Monitoring started."));
    return result;
}

int WriteToLog(TCHAR *str){
    FILE * log;
    _tfopen_s(&log, LOGFILE, _T("a+"));
    if (log == NULL)
    {
        return -1;
    }
    _ftprintf(log,_T("%s\n"), str);
    fclose(log);

    return 0;
}

SC.exe管理Service

sc命令的語法格式：

sc create MyService binpath= e:/xxx/MyService.exe ;創(chuàng)建服務(wù)MyService
sc start MyService ;啟動(dòng)服務(wù)
sc stop MyService ;停止服務(wù)
sc delete MyService ; 刪除服務(wù)
sc config 服務(wù)名 start= auto|demand|disabled ;修改服務(wù)啟動(dòng)類型规求。start參數(shù)的值可以是demand（手動(dòng)）筐付、disabled（禁用），auto（自動(dòng)）阻肿。

參考

C++編寫Windows服務(wù)
https://blog.csdn.net/nodeathphoenix/article/details/24181509