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用Delphi创建服务程序

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韩冰

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电梯直达

1^#

发表于 2004-11-21 12:05 |只看该作者 |倒序浏览

|招呼Ta 关注Ta

(1)不用登陆进系统即可运行.
(2)具有SYSTEM特权.所以你在进程管理器里面是无法结束它的.

笔者在2003年为一公司开发机顶盒项目的时候,曾经写过课件上传和媒体服务,下面就介绍一下如何用Delphi7创建一个Service程序.
运行Delphi7,选择菜单File-->New-->Other--->Service Application.将生成一个服务程序的框架.将工程保存为ServiceDemo.dpr和Unit_Main.pas,然后回到主框架.我们注意到,Service有几个属性.其中以下几个是我们比较常用的:

(1)DisplayName:服务的显示名称
(2)Name:服务名称.

我们在这里将DisplayName的值改为"Delphi服务演示程序",Name改为"DelphiService".编译这个项目,将得到ServiceDemo.exe.这已经是一个服务程序了!进入CMD模式,切换致工程所在目录,运行命令"ServiceDemo.exe /install",将提示服务安装成功!然后"net start DelphiService"将启动这个服务.进入控制面版-->管理工具-->服务,将显示这个服务和当前状态.不过这个服务现在什么也干不了,因为我们还没有写代码

先"net stop DelphiService"停止再"ServiceDemo.exe /uninstall"删除这个服务.回到Delphi7的IDE.

我们的计划是为这个服务添加一个主窗口,运行后任务栏显示程序的图标,双击图标将显示主窗口,上面有一个按钮,点击该按钮将实现Ctrl+Alt+Del功能.

实际上,服务程序莫认是工作于Winlogon桌面的,可以打开控制面板,查看我们刚才那个服务的属性-->登陆,其中"允许服务与桌面交互"是不打钩的.怎么办?呵呵,回到IDE,注意那个布尔属性:Interactive,当这个属性为True的时候,该服务程序就可以与桌面交互了.

File-->New-->Form为服务添加窗口FrmMain,单元保存为Unit_FrmMain,并且把这个窗口设置为手工创建.完成后的代码如下:

unit Unit_Main;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, SvcMgr, Dialogs, Unit_FrmMain;

type
TDelphiService = class(TService)
procedure ServiceContinue(Sender: TService; var Continued: Boolean);
procedure ServiceExecute(Sender: TService);
procedure ServicePause(Sender: TService; var Paused: Boolean);
procedure ServiceShutdown(Sender: TService);
procedure ServiceStart(Sender: TService; var Started: Boolean);
procedure ServiceStop(Sender: TService; var Stopped: Boolean);
private
{ Private declarations }
public
function GetServiceController: TServiceController; override;
{ Public declarations }
end;

var
DelphiService: TDelphiService;
FrmMain: TFrmMain;
implementation

{$R *.DFM}

procedure ServiceController(CtrlCode: DWord); stdcall;
begin
DelphiService.Controller(CtrlCode);
end;

function TDelphiService.GetServiceController: TServiceController;
begin
Result := ServiceController;
end;

procedure TDelphiService.ServiceContinue(Sender: TService;
var Continued: Boolean);
begin
while not Terminated do
begin
Sleep(10);
ServiceThread.ProcessRequests(False);
end;
end;

procedure TDelphiService.ServiceExecute(Sender: TService);
begin
while not Terminated do
begin
Sleep(10);
ServiceThread.ProcessRequests(False);
end;
end;

procedure TDelphiService.ServicePause(Sender: TService;
var Paused: Boolean);
begin
Paused := True;
end;

procedure TDelphiService.ServiceShutdown(Sender: TService);
begin
gbCanClose := true;
FrmMain.Free;
Status := csStopped;
ReportStatus();
end;

procedure TDelphiService.ServiceStart(Sender: TService;
var Started: Boolean);
begin
Started := True;
Svcmgr.Application.CreateForm(TFrmMain, FrmMain);
gbCanClose := False;
FrmMain.Hide;
end;

procedure TDelphiService.ServiceStop(Sender: TService;
var Stopped: Boolean);
begin
Stopped := True;
gbCanClose := True;
FrmMain.Free;
end;

end.

主窗口单元如下:

unit Unit_FrmMain;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, ShellApi, Graphics, Controls, Forms,
Dialogs, ExtCtrls, StdCtrls;

const
WM_TrayIcon = WM_USER + 1234;
type
TFrmMain = class(TForm)
Timer1: TTimer;
Button1: TButton;
procedure FormCreate(Sender: TObject);
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
procedure FormDestroy(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
IconData: TNotifyIconData;
procedure AddIconToTray;
procedure DelIconFromTray;
procedure TrayIconMessage(var Msg: TMessage); message WM_TrayIcon;
procedure SysButtonMsg(var Msg: TMessage); message WM_SYSCOMMAND;
public
{ Public declarations }
end;

var
FrmMain: TFrmMain;
gbCanClose: Boolean;
implementation

{$R *.dfm}

procedure TFrmMain.FormCreate(Sender: TObject);
begin
FormStyle := fsStayOnTop;
SetWindowLong(Application.Handle, GWL_EXSTYLE, WS_EX_TOOLWINDOW);
gbCanClose := False;
Timer1.Interval := 1000;
Timer1.Enabled := True;
end;

procedure TFrmMain.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
CanClose := gbCanClose;
if not CanClose then
begin
Hide;
end;
end;

procedure TFrmMain.FormDestroy(Sender: TObject);
begin
Timer1.Enabled := False;
DelIconFromTray;
end;

procedure TFrmMain.AddIconToTray;
begin
ZeroMemory(@IconData, SizeOf(TNotifyIconData));
IconData.cbSize := SizeOf(TNotifyIconData);
IconData.Wnd := Handle;
IconData.uID := 1;
IconData.uFlags := NIF_MESSAGE or NIF_ICON or NIF_TIP;
IconData.uCallbackMessage := WM_TrayIcon;
IconData.hIcon := Application.Icon.Handle;
IconData.szTip := 'Delphi服务演示程序';
Shell_NotifyIcon(NIM_ADD, @IconData);
end;

procedure TFrmMain.DelIconFromTray;
begin
Shell_NotifyIcon(NIM_DELETE, @IconData);
end;

procedure TFrmMain.SysButtonMsg(var Msg: TMessage);
begin
if (Msg.wParam = SC_CLOSE) or
(Msg.wParam = SC_MINIMIZE) then Hide
else inherited; // 执行默认动作
end;

procedure TFrmMain.TrayIconMessage(var Msg: TMessage);
begin
if (Msg.LParam = WM_LBUTTONDBLCLK) then Show();
end;

procedure TFrmMain.Timer1Timer(Sender: TObject);
begin
AddIconToTray;
end;

procedure SendHokKey;stdcall;
var
HDesk_WL: HDESK;
begin
HDesk_WL := OpenDesktop ('Winlogon', 0, False, DESKTOP_JOURNALPLAYBACK);
if (HDesk_WL <> 0) then
if (SetThreadDesktop (HDesk_WL) = True) then
PostMessage(HWND_BROADCAST, WM_HOTKEY, 0, MAKELONG (MOD_ALT or MOD_CONTROL, VK_DELETE));
end;

procedure TFrmMain.Button1Click(Sender: TObject);
var
dwThreadID : DWORD;
begin
CreateThread(nil, 0, @SendHokKey, nil, 0, dwThreadID);
end;

end.

补充:
(1)关于更多服务程序的演示程序,请访问以下Url:http://www.torry.net/pages.php?id=226,上面包含了多个演示如何控制和管理系统服务的代码.

(2)请切记:Windows实际上存在多个桌面.例如屏幕传输会出现白屏,可能有两个原因:一是系统处于锁定或未登陆桌面,二是处于屏幕保护桌面.这时候要将当前桌面切换到该桌面才能抓屏.

(3)关于服务程序与桌面交互,还有种动态切换方法.大概单元如下:
unit ServiceDesktop;

interface

function InitServiceDesktop: boolean;
procedure DoneServiceDeskTop;

implementation

uses Windows, SysUtils;

const
DefaultWindowStation = 'WinSta0';
DefaultDesktop = 'Default';
var
hwinstaSave: HWINSTA;
hdeskSave: HDESK;
hwinstaUser: HWINSTA;
hdeskUser: HDESK;
function InitServiceDesktop: boolean;
var
dwThreadId: DWORD;
begin
dwThreadId := GetCurrentThreadID;
// Ensure connection to service window station and desktop, and
// save their handles.
hwinstaSave := GetProcessWindowStation;
hdeskSave := GetThreadDesktop(dwThreadId);

hwinstaUser := OpenWindowStation(DefaultWindowStation, FALSE, MAXIMUM_ALLOWED);
if hwinstaUser = 0 then
begin
OutputDebugString(PChar('OpenWindowStation failed' + SysErrorMessage(GetLastError)));
Result := false;
exit;
end;

if not SetProcessWindowStation(hwinstaUser) then
begin
OutputDebugString('SetProcessWindowStation failed');
Result := false;
exit;
end;

hdeskUser := OpenDesktop(DefaultDesktop, 0, FALSE, MAXIMUM_ALLOWED);
if hdeskUser = 0 then
begin
OutputDebugString('OpenDesktop failed');
SetProcessWindowStation(hwinstaSave);
CloseWindowStation(hwinstaUser);
Result := false;
exit;
end;
Result := SetThreadDesktop(hdeskUser);
if not Result then
OutputDebugString(PChar('SetThreadDesktop' + SysErrorMessage(GetLastError)));
end;

procedure DoneServiceDeskTop;
begin
// Restore window station and desktop.
SetThreadDesktop(hdeskSave);
SetProcessWindowStation(hwinstaSave);
if hwinstaUser <> 0 then
CloseWindowStation(hwinstaUser);
if hdeskUser <> 0 then
CloseDesktop(hdeskUser);
end;

initialization
InitServiceDesktop;
finalization
DoneServiceDesktop;
end.
更详细的演示代码请参看:http://www.torry.net/samples/samples/os/isarticle.zip

(4)关于安装服务如何添加服务描述.有两种方法:一是修改注册表.服务的详细信息都位于HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\下面,例如我们刚才那个服务就位于HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\DelphiService下.第二种方法就是先用QueryServiceConfig2函数获取服务信息,然后ChangeServiceConfig2来改变描述.用Delphi实现的话,单元如下:

unit WinSvcEx;

interface

uses Windows, WinSvc;

const
//
// Service config info levels
//
SERVICE_CONFIG_DESCRIPTION = 1;
SERVICE_CONFIG_FAILURE_ACTIONS = 2;

zan

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韩冰

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2^#

发表于 2004-11-21 12:08 |只看该作者 |招呼Ta 关注Ta

//
// DLL name of imported functions
//
AdvApiDLL = 'advapi32.dll';
type
//
// Service description string
//
PServiceDescriptionA = ^TServiceDescriptionA;
PServiceDescriptionW = ^TServiceDescriptionW;
PServiceDescription = PServiceDescriptionA;
{$EXTERNALSYM _SERVICE_DESCRIPTIONA}
_SERVICE_DESCRIPTIONA = record
lpDescription : PAnsiChar;
end;
{$EXTERNALSYM _SERVICE_DESCRIPTIONW}
_SERVICE_DESCRIPTIONW = record
lpDescription : PWideChar;
end;
{$EXTERNALSYM _SERVICE_DESCRIPTION}
_SERVICE_DESCRIPTION = _SERVICE_DESCRIPTIONA;
{$EXTERNALSYM SERVICE_DESCRIPTIONA}
SERVICE_DESCRIPTIONA = _SERVICE_DESCRIPTIONA;
{$EXTERNALSYM SERVICE_DESCRIPTIONW}
SERVICE_DESCRIPTIONW = _SERVICE_DESCRIPTIONW;
{$EXTERNALSYM SERVICE_DESCRIPTION}
SERVICE_DESCRIPTION = _SERVICE_DESCRIPTIONA;
TServiceDescriptionA = _SERVICE_DESCRIPTIONA;
TServiceDescriptionW = _SERVICE_DESCRIPTIONW;
TServiceDescription = TServiceDescriptionA;

//
// Actions to take on service failure
//
{$EXTERNALSYM _SC_ACTION_TYPE}
_SC_ACTION_TYPE = (SC_ACTION_NONE, SC_ACTION_RESTART, SC_ACTION_REBOOT, SC_ACTION_RUN_COMMAND);
{$EXTERNALSYM SC_ACTION_TYPE}
SC_ACTION_TYPE = _SC_ACTION_TYPE;

PServiceAction = ^TServiceAction;
{$EXTERNALSYM _SC_ACTION}
_SC_ACTION = record
aType : SC_ACTION_TYPE;
Delay : DWORD;
end;
{$EXTERNALSYM SC_ACTION}
SC_ACTION = _SC_ACTION;
TServiceAction = _SC_ACTION;

PServiceFailureActionsA = ^TServiceFailureActionsA;
PServiceFailureActionsW = ^TServiceFailureActionsW;
PServiceFailureActions = PServiceFailureActionsA;
{$EXTERNALSYM _SERVICE_FAILURE_ACTIONSA}
_SERVICE_FAILURE_ACTIONSA = record
dwResetPeriod : DWORD;
lpRebootMsg : LPSTR;
lpCommand : LPSTR;
cActions : DWORD;
lpsaActions : ^SC_ACTION;
end;
{$EXTERNALSYM _SERVICE_FAILURE_ACTIONSW}
_SERVICE_FAILURE_ACTIONSW = record
dwResetPeriod : DWORD;
lpRebootMsg : LPWSTR;
lpCommand : LPWSTR;
cActions : DWORD;
lpsaActions : ^SC_ACTION;
end;
{$EXTERNALSYM _SERVICE_FAILURE_ACTIONS}
_SERVICE_FAILURE_ACTIONS = _SERVICE_FAILURE_ACTIONSA;
{$EXTERNALSYM SERVICE_FAILURE_ACTIONSA}
SERVICE_FAILURE_ACTIONSA = _SERVICE_FAILURE_ACTIONSA;
{$EXTERNALSYM SERVICE_FAILURE_ACTIONSW}
SERVICE_FAILURE_ACTIONSW = _SERVICE_FAILURE_ACTIONSW;
{$EXTERNALSYM SERVICE_FAILURE_ACTIONS}
SERVICE_FAILURE_ACTIONS = _SERVICE_FAILURE_ACTIONSA;
TServiceFailureActionsA = _SERVICE_FAILURE_ACTIONSA;
TServiceFailureActionsW = _SERVICE_FAILURE_ACTIONSW;
TServiceFailureActions = TServiceFailureActionsA;

///////////////////////////////////////////////////////////////////////////
// API Function Prototypes
///////////////////////////////////////////////////////////////////////////
TQueryServiceConfig2 = function (hService : SC_HANDLE; dwInfoLevel : DWORD; lpBuffer : pointer;
cbBufSize : DWORD; var pcbBytesNeeded) : BOOL; stdcall;
TChangeServiceConfig2 = function (hService : SC_HANDLE; dwInfoLevel : DWORD; lpInfo : pointer) : BOOL; stdcall;

var
hDLL : THandle ;
LibLoaded : boolean ;

var
OSVersionInfo : TOSVersionInfo;

{$EXTERNALSYM QueryServiceConfig2A}
QueryServiceConfig2A : TQueryServiceConfig2;
{$EXTERNALSYM QueryServiceConfig2W}
QueryServiceConfig2W : TQueryServiceConfig2;
{$EXTERNALSYM QueryServiceConfig2}
QueryServiceConfig2 : TQueryServiceConfig2;

{$EXTERNALSYM ChangeServiceConfig2A}
ChangeServiceConfig2A : TChangeServiceConfig2;
{$EXTERNALSYM ChangeServiceConfig2W}
ChangeServiceConfig2W : TChangeServiceConfig2;
{$EXTERNALSYM ChangeServiceConfig2}
ChangeServiceConfig2 : TChangeServiceConfig2;

implementation

initialization
OSVersionInfo.dwOSVersionInfoSize := SizeOf(OSVersionInfo);
GetVersionEx(OSVersionInfo);
if (OSVersionInfo.dwPlatformId = VER_PLATFORM_WIN32_NT) and (OSVersionInfo.dwMajorVersion >= 5) then
begin
if hDLL = 0 then
begin
hDLL:=GetModuleHandle(AdvApiDLL);
LibLoaded := False;
if hDLL = 0 then
begin
hDLL := LoadLibrary(AdvApiDLL);
LibLoaded := True;
end;
end;

if hDLL <> 0 then
begin
@QueryServiceConfig2A := GetProcAddress(hDLL, 'QueryServiceConfig2A');
@QueryServiceConfig2W := GetProcAddress(hDLL, 'QueryServiceConfig2W');
@QueryServiceConfig2 := @QueryServiceConfig2A;
@ChangeServiceConfig2A := GetProcAddress(hDLL, 'ChangeServiceConfig2A');
@ChangeServiceConfig2W := GetProcAddress(hDLL, 'ChangeServiceConfig2W');
@ChangeServiceConfig2 := @ChangeServiceConfig2A;
end;
end
else
begin
@QueryServiceConfig2A := nil;
@QueryServiceConfig2W := nil;
@QueryServiceConfig2 := nil;
@ChangeServiceConfig2A := nil;
@ChangeServiceConfig2W := nil;
@ChangeServiceConfig2 := nil;
end;

finalization
if (hDLL <> 0) and LibLoaded then
FreeLibrary(hDLL);

end.

unit winntService;

interface

uses
Windows,WinSvc,WinSvcEx;

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发表于 2004-11-21 12:09 |只看该作者 |招呼Ta 关注Ta

function InstallService(const strServiceName,strDisplayName,strDescription,strFilename: string):Boolean;
//eg:InstallService('服务名称','显示名称','描述信息','服务文件');
procedure UninstallService(strServiceName:string);
implementation

function StrLCopy(Dest: PChar; const Source: PChar; MaxLen: Cardinal): PChar; assembler;
asm
PUSH EDI
PUSH ESI
PUSH EBX
MOV ESI,EAX
MOV EDI,EDX
MOV EBX,ECX
XOR AL,AL
TEST ECX,ECX
JZ @@1
REPNE SCASB
JNE @@1
INC ECX
@@1: SUB EBX,ECX
MOV EDI,ESI
MOV ESI,EDX
MOV EDX,EDI
MOV ECX,EBX
SHR ECX,2
REP MOVSD
MOV ECX,EBX
AND ECX,3
REP MOVSB
STOSB
MOV EAX,EDX
POP EBX
POP ESI
POP EDI
end;

function StrPCopy(Dest: PChar; const Source: string): PChar;
begin
Result := StrLCopy(Dest, PChar(Source), Length(Source));
end;

function InstallService(const strServiceName,strDisplayName,strDescription,strFilename: string):Boolean;
var
//ss : TServiceStatus;
//psTemp : PChar;
hSCM,hSCS:THandle;

srvdesc : PServiceDescription;
desc : string;
//SrvType : DWord;

lpServiceArgVectors:pchar;
begin
Result:=False;
//psTemp := nil;
//SrvType := SERVICE_WIN32_OWN_PROCESS and SERVICE_INTERACTIVE_PROCESS;
hSCM:=OpenSCManager(nil,nil,SC_MANAGER_ALL_ACCESS);//连接服务数据库
if hSCM=0 then Exit;//MessageBox(hHandle,Pchar(SysErrorMessage(GetLastError)),'服务程序管理器',MB_ICONERROR+MB_TOPMOST);

hSCS:=CreateService( //创建服务函数
hSCM, // 服务控制管理句柄
Pchar(strServiceName), // 服务名称
Pchar(strDisplayName), // 显示的服务名称
SERVICE_ALL_ACCESS, // 存取权利
SERVICE_WIN32_OWN_PROCESS or SERVICE_INTERACTIVE_PROCESS,// 服务类型 SERVICE_WIN32_SHARE_PROCESS
SERVICE_AUTO_START, // 启动类型
SERVICE_ERROR_IGNORE, // 错误控制类型
Pchar(strFilename), // 服务程序
nil, // 组服务名称
nil, // 组标识
nil, // 依赖的服务
nil, // 启动服务帐号
nil); // 启动服务口令
if hSCS=0 then Exit;//MessageBox(hHandle,Pchar(SysErrorMessage(GetLastError)),Pchar(Application.Title),MB_ICONERROR+MB_TOPMOST);

if Assigned(ChangeServiceConfig2) then
begin
desc := Copy(strDescription,1,1024);
GetMem(srvdesc,SizeOf(TServiceDescription));
GetMem(srvdesc^.lpDescription,Length(desc) + 1);
try
StrPCopy(srvdesc^.lpDescription, desc);
ChangeServiceConfig2(hSCS,SERVICE_CONFIG_DESCRIPTION,srvdesc);
finally
FreeMem(srvdesc^.lpDescription);
FreeMem(srvdesc);
end;
end;
lpServiceArgVectors := nil;
if not StartService(hSCS, 0, lpServiceArgVectors) then //启动服务
Exit; //MessageBox(hHandle,Pchar(SysErrorMessage(GetLastError)),Pchar(Application.Title),MB_ICONERROR+MB_TOPMOST);
CloseServiceHandle(hSCS); //关闭句柄
Result:=True;
end;
procedure UninstallService(strServiceName:string);
var
SCManager: SC_HANDLE;
Service: SC_HANDLE;
Status: TServiceStatus;
begin
SCManager := OpenSCManager(nil, nil, SC_MANAGER_ALL_ACCESS);
if SCManager = 0 then Exit;
try
Service := OpenService(SCManager, Pchar(strServiceName), SERVICE_ALL_ACCESS);
ControlService(Service, SERVICE_CONTROL_STOP, Status);
DeleteService(Service);
CloseServiceHandle(Service);
finally
CloseServiceHandle(SCManager);
end;
end;

end.

(5)如何暴力关闭一个服务程序,实现我们以前那个"NT工具箱"的功能?首先,根据进程名称来杀死进程是用以下函数:
uses Tlhelp32;

function KillTask(ExeFileName: string): Integer;
const
PROCESS_TERMINATE = 01;
var
ContinueLoop: BOOL;
FSnapshotHandle: THandle;
FProcessEntry32: TProcessEntry32;
begin
Result := 0;
FSnapshotHandle := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
FProcessEntry32.dwSize := SizeOf(FProcessEntry32);
ContinueLoop := Process32First(FSnapshotHandle, FProcessEntry32);

while Integer(ContinueLoop) <> 0 do
begin
if ((UpperCase(ExtractFileName(FProcessEntry32.szExeFile)) =
UpperCase(ExeFileName)) or (UpperCase(FProcessEntry32.szExeFile) =
UpperCase(ExeFileName))) then
Result := Integer(TerminateProcess(
OpenProcess(PROCESS_TERMINATE,
BOOL(0),
FProcessEntry32.th32ProcessID),
0));
ContinueLoop := Process32Next(FSnapshotHandle, FProcessEntry32);
end;
CloseHandle(FSnapshotHandle);
end;

但是对于服务程序,它会提示"拒绝访问".其实只要程序拥有Debug权限即可:
function EnableDebugPrivilege: Boolean;
function EnablePrivilege(hToken: Cardinal; PrivName: string; bEnable: Boolean): Boolean;
var
TP: TOKEN_PRIVILEGES;
Dummy: Cardinal;
begin
TP.PrivilegeCount := 1;
LookupPrivilegeValue(nil, pchar(PrivName), TP.Privileges[0].Luid);
if bEnable then
TP.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED
else TP.Privileges[0].Attributes := 0;
AdjustTokenPrivileges(hToken, False, TP, SizeOf(TP), nil, Dummy);
Result := GetLastError = ERROR_SUCCESS;
end;

var
hToken: Cardinal;
begin
OpenProcessToken(GetCurrentProcess, TOKEN_ADJUST_PRIVILEGES, hToken);
result:=EnablePrivilege(hToken, 'SeDebugPrivilege', True);
CloseHandle(hToken);
end;

使用方法:
EnableDebugPrivilege;//提升权限
KillTask('xxxx.exe');//关闭该服务程序.

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