RegisterServiceProcess(
  DWORD dwProcessId,  
  DWORD dwType        
);
 

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    Windows NT 下Service 的 编 程 
    江 苏 省 电 信 传 输 局 
    周 晓 
    ---- Windows NT Server 提 供 多 种 功 能 强 大 的 服 务(Service), 例 如FTP,WWW 或 远 程 登 录 服 务, 另 外 常 用 的 数 据 库 服 务 器 也 是 以Service 的 形 式 存 在 于NT Server 上 的, 如Sybase SQL Server For NT。Service 一 般 在NT 启 动 时 自 动 启 动, 在NT 关 机 时 停 止。 但 是 有 时 用 户 可 能 想 手 工 启 动﹑ 暂 停﹑ 停 止 某 项Service, 这 就 需 要 在 控 制 面 板 中 进 行 配 置, 对 于 不 太 熟 悉NT 的 用 户 来 说 比 较 困 难; 对 于 软 件 开 发 人 员, 有 时 需 要 在 软 件 中 访 问 和 操 作 某 项Service, 甚 至 可 能 需 要 开 发 新Service 的 提 供 给 用 户 使 用。 上 面 两 种 情 况 都 可 以 通 过 对Service 的 编 程 来 解 决。 对Service 的 编 程 涉 及 到NT 的 内 核, 比 较 复 杂 且 相 关 资 料 较 少, 给 软 件 开 发 人 员 带 来 很 多 困 难, 笔 者 通 过 对Windows NT 的API 的 分 析 找 到 了 相 应 的 编 程 方 法, 再 此 介 绍 给 大 家。 ---- 在Windows NT 下, 各 种Service 都 存 在service control manager database 中, 因 此 我 们 可 以 通 过 对service control manager database 进 行 操 作 来 实 现 对Service 的 编 程。 下 面 介 绍 常 用 的 函 数:    1:SC_HANDLE  OpenSCManager
          (LPCTSTR  lpszMachineName,
          LPCTSTR   lpszDatabaseName,
          DWORD    fdwDesiredAccess); ---- OpenSCManager 函 数 打 开 指 定 计 算 机 上 的service control manager database 。 其 中 参 数lpszMachineName 指 定 计 算 机 名, 若 为 空 则 指 定 为 本 机。 参 数lpszDatabaseName 指 定 要 打 开 的service control manager database, 默 认 为 空。 
    ---- 参 数fdwDesiredAccess 指 定 操 作 的 权 限, 可 以 为 下 面 取 值 之 一         SC_MANAGER_ALL_ACCESS       //所有权限
            SC_MANAGER_CONNECT      
           //允许连接service control manager
            SC_MANAGER_CREATE_SERVICE  
           //允许创建服务对象并把它加入
           service control manager database
            SC_MANAGER_ENUMERATE_SERVICE
         //允许枚举service control manager database中的服务
            SC_MANAGER_LOCK     
          //允许锁住service control manager database
            SC_MANAGER_QUERY_LOCK_STATUS
         //允许获取service control manager database的封锁信息---- 函 数 返 回 值: 函 数 执 行 成 功 则 返 回 一 个 指 向service control manager database 的 句 柄, 失 败 则 返 回NULL。 
       2:SC_HANDLE OpenService
          (SC_HANDLE  schSCManager,
          LPCTSTR     lpszServiceName,
          DWORD      fdwDesiredAccess);---- OpenService 函 数 打 开 指 定 的Service。 
    ---- 其 中 参 数schSCManager 是 指 向service control manager database 的 句 柄, 由OpenSCManager 函 数 返 回。 ---- 参 数lpszServiceName 要 打 开 的 服 务 的 名 字, 注 意 大 小 写。 ---- 参 数fdwDesiredAccess 指 定 操 作 的 权 限, 可 以 为 下 面 取 值 之 一 SERVICE_ALL_ACCESS          
         //所有权限
         SERVICE_CHANGE_CONFIG      
         //允许更改服务的配置
         SERVICE_ENUMERATE_DEPENDENTS
         //允许获取依赖于该服务的其他服务
         SERVICE_INTERROGATE
         //允许立即获取服务状态
         SERVICE_PAUSE_CONTINUE
         //允许暂停和唤醒服务
         SERVICE_QUERY_CONFIG
      //允许获取服务配置
         SERVICE_QUERY_STATU   
         //允许通过访问service control manager获取服务状态
         SERVICE_START
        //允许启动服务
         SERVICE_STOP    
        //允许停止服务
         SERVICE_USER_DEFINE_CONTROL
      //允许用户指定特殊的服务控制码
     
    ---- 函 数 返 回 值: 函 数 执 行 成 功 则 返 回 指 向 某 项 服 务 的 句 柄, 失 败 则 返 回NULL。 
    3:BOOL QueryServiceStatus
          (SC_HANDLE         schService,
              LPSERVICE_STATUS  lpssServiceStatus);---- QueryServiceStatus函数返回指定服务的当前状态。 
    ---- 其中参数schService是指向某项服务的句柄,由OpenService函数返回,且必须SERVICE_QUERY_STATUS的权限。 ---- 参数lpssServiceStatus中存放返回的服务状态信息,结构如下 typedef struct _SERVICE_STATUS {  
    DWORD dwServiceType;
                  //服务类型
    DWORD dwCurrentState;
                  //当前状态
    DWORD dwControlsAccepted;
              //服务可接受的控制码
    DWORD dwWin32ExitCode; 
              //Win32出错代码
    DWORD dwServiceSpecificExitCode;
        //服务出错代码
    DWORD dwCheckPoint;
         //用于跟踪服务长时间操作
    DWORD dwWaitHint;
         //服务某一操作的最大允许时间,以毫秒为单位
    } SERVICE_STATUS, *LPSERVICE_STATUS; ---- 函 数 返 回 值: 函 数 执 行 成 功 则 返 回True, 失 败 则 返 回False。 
        4:BOOL StartService(SC_HANDLE   schService,
                       DWORD       dwNumServiceArgs,
                       LPCTSTR      *lpszServiceArgs);---- StartService 函 数 启 动 指 定 的 服 务。 
    ---- 其 中 参 数schService 是 指 向 某 项 服 务 的 句 柄, 由OpenService 函 数 返 回, 且 必 须 有SERVICE_START 的 权 限。 ---- dwNumServiceArgs 为 启 动 服 务 所 需 的 参 数 的 个 数。 ---- lpszServiceArgs 为 启 动 服 务 所 需 的 参 数。 函 数 返 回 值: 函 数 执 行 成 功 则 返 回True, 失 败 则 返 回False。     5:BOOL ControlService(
            SC_HANDLE         hService,
            DWORD             dwControl,
            LPSERVICE_STATUS  lpServiceStatus);---- ControlService 函 数 向Win32 service 发 送 控 制 码。 
    ---- 其 中 参 数hService 是 指 向 某 项 服 务 的 句 柄, 由OpenService 函 数 返 回。 ---- 参 数dwControl 为 控 制 码, 常 用 的 有 SERVICE_CONTROL_STOP
                 //停止服务
    SERVICE_CONTROL_PAUSE
              //暂停服务
    SERVICE_CONTROL_CONTINUE
            //唤醒暂停的服务
    SERVICE_CONTROL_INTERROGATE
       //刷新某服务的状态---- 参 数lpServiceStatus 指 向SERVICE_STATUS 结 构, 用 于 存 放 该 服 务 最 新 的 状 态 信 息。 ---- 函 数 返 回 值: 函 数 执 行 成 功 则 返 回True, 失 败 则 返 回False。 6:BOOL EnumServicesStatus
              (SC_HANDLE  hSCManager,
                   DWORD      dwServiceType,
                   DWORD      dwServiceState,
                   LPENUM_SERVICE_STATUS  lpServices, 
                   DWORD      cbBufSize,
                   LPDWORD    pcbBytesNeeded,
                   LPDWORD    lpServicesReturned,
                   LPDWORD    lpResumeHandle);---- EnumServicesStatus 函 数 用 于 枚 举NT 下 存 在 的Service。 
    ---- 其 中 参 数hSCManager 是 指 向service control manager database 的 句 柄, 由OpenSCManager 函 数 返 回, 且 必 须 有SC_MANAGER_ENUMERATE_SERVICE 的 权 限。 ---- 参 数dwServiceType 指 定 按 服 务 的 类 型 枚 举。 ---- 参 数dwServiceState 指 定 按 服 务 的 状 态 枚 举。 ---- 参 数lpServices 指 向ENUM_SERVICE_STATUS 结 构, 用 于 存 放 返 回 的 服 务 的 名 字 和 状 态 信 息。 ---- 参 数cbBufSize 返 回 参 数lpServices 的 长 度, 以 字 节 为 单 位。 ---- 参 数pcbBytesNeeded 返 回 获 取 剩 余 的Service 所 需 字 节 的 个 数。 ---- 参 数lpServicesReturned 返 回 服 务 的 个 数。 ---- 参 数lpResumeHandle, 当 第 一 次 调 用 时 该 参 数 为0, 当 该 函 数 再 次 被 调 用 以 获 取 另 外 的 信 息 时, 该 参 数 表 示 下 一 个 被 读 的Service。 ---- 函 数 返 回 值: 函 数 执 行 成 功 则 返 回True, 失 败 则 返 回False。 ---- 值 得 注 意 的 是 通 常 情 况 下 该 函 数 返 回 的 结 果 为FALSE, 我 们 可 以 调 用GetLastError() 来 获 取 进 一 步 信 息。 因 为 一 台 机 器 上 有 多 种 服 务 存 在, 所 以GetLastError() 应 为ERROR_MORE_DATA, 此 时 应 再 次 调 用EnumServicesStatus 函 数 以 获 取 正 确 的Service 列 表。 ---- 下 面 有 一 个 用Delphi 编 的 一 个 程 序 例 子, 用 其 他 开 发 工 具 如VC,VB 也 可 实 现。 程 序 运 行 时, 单 击 按 钮Button1 枚 举NT 中 的Service 并 显 示 在 列 表 框ListBox1 中。 在ListBox1 选 中 某 个Service, 单 击 按 钮Button2 则 启 动 该Service, 单 击 按 钮Button3 则 停 止 该Service。 unit Unit1;interfaceuses
      Windows,Messages, SysUtils, Classes,
      Graphics,Controls,Forms, 
       Dialogs,StdCtrls,Winsvc;type
      TForm1 = class(TForm)
        ListBox1: TlistBox;
        Button1: Tbutton;
        Button2: Tbutton;
        Button3: Tbutton;
        procedure Button1Click(Sender: TObject);
        procedure Button3Click(Sender: TObject);
        procedure Button2Click(Sender: TObject);
    procedure FormClose
    (Sender: TObject; var Action: TCloseAction);  private
        { Private declarations }
      public
      hscmanager,hService:SC_HANDLE;
      returnstatus:TServiceStatus;
        { Public declarations }
      end;var
      Form1: TForm1;implementation{$R *.DFM}procedure TForm1.Button1Click(Sender: TObject);
    var
    BytesNeeded,serviceReturned,resumeHandle:Dword;
    returnflag:Bool;
    lpservice:Array[0..100] of  TEnumServiceStatus;
    service:TEnumServiceStatus;
    i,bytes:Dword;
    begin
    ListBox1.Items.Clear;
    returnflag:=false;
    resumeHandle:=0;
    hscmanager:=OpenSCManager(nil,nil,SC_MANAGER
    _ENUMERATE_SERVICE);// 打开
     service control manager database
    if  hscmanager<0 then
        Begin
    showmessage('无法打开
    service control manager database');
        exit;
        End; 
    returnflag:=EnumServicesStatus(hscmanager,
    SERVICE_DRIVER,SERVICE_ACTIVE,
     service,sizeof(service),BytesNeeded,serviceR
    eturned,resumeHandle);
    //枚举Service
    if (returnflag=false) and (GetLastError()
    =ERROR_MORE_DATA) then
        begin
        bytes:=BytesNeeded+sizeof(TEnumServiceStatus);
    EnumServicesStatus(hscmanager,SERVICE_
    DRIVER,SERVICE_ACTIVE,
    lpservice[0],bytes,BytesNeeded,service
    Returned,resumeHandle);
        for i:=0 to serviceReturned-1 do
            begin
            ListBox1.Items.Add(lpservice[i].lpServiceName);
            end;
        end;
    end;procedure TForm1.Button2Click(Sender: TObject);
    var
    i:integer;
    lpServiceArgVectors:Pchar;
    begin
    lpServiceArgVectors:=nil;
    for i :=0 to (ListBox1.Items.Count-1) do
       if ListBox1.Selected[i] then
         begin
         hService:=OpenService(hscmanager,Pchar
    (ListBox1.Items[i]),SERVICE_ALL_ACCESS);
    //打开该Service
         if hService<0 then
            begin
            showmessage('无法打开该Service');
            exit;
            end;
            QueryServiceStatus(hService,returnstatus);
    //查看该Service的状态
         if returnstatus.dwCurrentState=SERVICE_STOPPED
       then //如果该Service已停止则启动它
            StartService(hService,0,lpServiceArgVectors);
         CloseServiceHandle(hService);//关闭该Service
        end;
    end;
    procedure TForm1.Button3Click(Sender: TObject);
    var
    i:integer;
    begin
     for i :=0 to (ListBox1.Items.Count-1) do
       if ListBox1.Selected[i] then
         begin
         hService:=OpenService(hscmanager,Pchar
    (ListBox1.Items[i]),SERVICE_ALL_ACCESS);
     //打开该Service
         if hService<0 then
            begin
            showmessage('无法打开该Service');
            exit;
            end;
            QueryServiceStatus(hService,returnstatus);
     查看该Service的状态
         if returnstatus.dwCurrentState=
    SERVICE_RUNNING then
    //如果该Service正在运行则停止它
            ControlService(hService,SERVICE
    _CONTROL_STOP,returnstatus);
     CloseServiceHandle(hService);//关闭该Service
        end;
    end;
    procedure TForm1.FormClose
    (Sender: TObject; var Action: TCloseAction);
    begin
    CloseServiceHandle(hscmanager);
    //关闭service control manager database
    End;end.