(1)不用登陆进系统即可运行. j* j- }" c/ `, Y2 Y! M (2)具有SYSTEM特权.所以你在进程管理器里面是无法结束它的. 9 |" k5 m1 T. d2 Y* R3 x/ k1 `9 r) ^" M, {( g, v
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. 0 A9 b1 D3 @: @, s
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: 3 C$ y/ x. c: q, E# r5 ^
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(1)DisplayName:服务的显示名称 6 [- z. y' c# @" L+ f( B1 x+ `
(2)Name:服务名称. 5 K+ s* q3 @: O$ Y2 E1 x3 c% O) c ( F5 i, \) ]' b) W3 Z9 }& g5 z 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. y! k+ X# Q& E) Y
6 g7 I+ g& M' h 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. 0 w5 i5 P6 _' C0 g' v4 p& [3 t: e# U/ f9 W
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. " u @5 ~" q$ @4 i9 a& b6 E
0 P9 F3 p; w( U. o/ k& _. L# v9 U0 a 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: . C. ]6 U/ N0 r, O* s" R2 D$ s & {+ {8 \1 H; q. H( ]" |3 i k: H) N b x j; q
unit Unit_Main; : T/ v# L' I2 J& B6 V
; d0 G0 | S( i8 k+ T7 o) kinterface 9 W8 e8 K5 A* y2 f
- `8 }: s" Y/ A: O* {
uses 8 K$ t- V8 b! ~+ W+ R
Windows, Messages, SysUtils, Classes, Graphics, Controls, SvcMgr, Dialogs, Unit_FrmMain; & R* E/ @, P; I o) L- c! g! K) T$ `) s* ~ R, m3 Y
type : h0 Q. x; X/ v/ J: N! ]4 s/ Q% MTDelphiService = class(TService) 0 {. @& w" e2 C3 D' r8 \% D0 a% k
procedure ServiceContinue(Sender: TService; var Continued: Boolean); 6 y. {' W' M1 D$ o8 K
procedure ServiceExecute(Sender: TService); ; o' y7 @( T, [: T. B1 m7 \- }procedure ServicePause(Sender: TService; var Paused: Boolean); 2 U. K) {4 w' N7 t0 c5 O0 I0 N; x
procedure ServiceShutdown(Sender: TService); * S4 ~: y4 K0 Qprocedure ServiceStart(Sender: TService; var Started: Boolean); 0 ?: {' V- r; o% @
procedure ServiceStop(Sender: TService; var Stopped: Boolean); 6 T' X6 o2 x6 ^, @( F
private 0 l1 J: {4 P6 _' K* F- Y$ S{ Private declarations } d& i2 L$ t# v0 A+ }
public * \6 j8 y _# J4 `
function GetServiceController: TServiceController; override; 4 z5 l- P, J- x7 W' j! k4 M( H
{ Public declarations } ! h, T) ]* P% l8 q/ o9 Oend; % V2 r, M5 n4 D+ s: L
4 i4 D. A5 T& yvar 9 t, i" ?( n% w9 s; j# w
DelphiService: TDelphiService; $ m) n, `8 B D) R. I! h! N" ?
FrmMain: TFrmMain; + k6 P$ I& o: V9 e& H: H* ~
implementation % F: B k- E) F" C, i3 H! R' s1 J5 W: ~! g! R$ _1 `
{$R *.DFM} : L: }6 Y4 \0 H2 p! O# Q
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procedure ServiceController(CtrlCode: DWord); stdcall; 5 \0 @) E6 f: y4 t( L
begin # O, ?4 D/ L: i! mDelphiService.Controller(CtrlCode); 7 e. m; L2 D- }; tend; # J# d4 y' r, e: P s g' k j " H& u, t" a( j+ V: lfunction TDelphiService.GetServiceController: TServiceController; " Z2 p/ d+ u6 c F) o( l
begin ; k: l0 v0 u" Y; z1 U! q
Result := ServiceController; # S) S, ~/ B# \9 mend; 6 I( ]) Y0 g! n& \
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procedure TDelphiService.ServiceContinue(Sender: TService; 1 w" y& m+ K/ h7 `; v
var Continued: Boolean); & L# ]" F( \( x' x* e' gbegin 8 X4 }% Z9 x. U* g9 ~4 N* _
while not Terminated do , _' _$ s1 o. Q0 A& S i2 Q; c) Z
begin x: M) v+ a, ]$ G2 N- A: {: u. P3 ASleep(10); * `2 F5 y3 J( ~/ YServiceThread.ProcessRequests(False); 3 X: G, x, m0 U ]2 s4 mend; ; q9 Z: E* a: xend; ( Y/ e. H( h0 M6 A( Z1 a. G" }& ~ % f. s! ^! Z$ H4 n! }procedure TDelphiService.ServiceExecute(Sender: TService); 8 @( c0 }& x: U( w( [% c. }& L
begin 8 ]0 j1 P, |9 L B7 d* U1 dwhile not Terminated do 4 x/ A% X3 f# x
begin F) h: R/ s; H' W# KSleep(10); 5 @: t0 g! S2 Q
ServiceThread.ProcessRequests(False); - u( g; _. o! S7 O$ Q T
end; 3 ^! m& q" j- t1 ~0 e; K/ \ \" i
end; 5 F1 z* o: ^2 T; K6 D' z6 {4 D
b7 G1 E- }. r! l+ g7 J' \procedure TDelphiService.ServicePause(Sender: TService; - {1 ^ N: J; A2 F( Bvar Paused: Boolean); / F% @' U' M& `" ~' [6 A
begin # l' Y$ M8 \) [5 `; OPaused := True; ( D' `% |7 [" L9 q# [
end; ( H! e2 N6 `( H: k
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procedure TDelphiService.ServiceShutdown(Sender: TService); ( m h1 [4 O9 `+ S
begin 4 t g/ t% i4 K3 m* YgbCanClose := true; 9 f& K# R+ b; H) x9 K3 b; O' [+ }5 H7 H b
FrmMain.Free; * V, t4 ~1 p9 i. D d G8 X
Status := csStopped; 8 F2 l3 V5 [0 B" b' Y* J$ v- A
ReportStatus(); ; x) |* F3 y0 _. a! x6 Y1 e
end; ) G8 {3 l: a1 {- X
+ h" a6 h! d; X ^procedure TDelphiService.ServiceStart(Sender: TService; , a2 {3 M- F- s6 m- B7 p* `" J7 s
var Started: Boolean); " D. z- \' l8 {* d' A# ?
begin 9 g* l. [0 A$ H' U DStarted := True; + a# j2 g* J. a' c) B
Svcmgr.Application.CreateForm(TFrmMain, FrmMain); " C; j; o, E' ogbCanClose := False; # K1 ?7 K3 r( B" d8 f; T7 L4 D
FrmMain.Hide; " C9 b9 F& Z/ G# e5 @; l0 U5 Kend; # q* x2 Y5 w( z7 {
# h+ a4 N! s2 q, Oprocedure TDelphiService.ServiceStop(Sender: TService; ; h1 B( M- o! l9 z5 k% L
var Stopped: Boolean); 7 E# P5 N c$ _/ P1 @" B& }begin + _. ]! _ S- ~7 a8 z4 W
Stopped := True; & Q. R3 m }5 c# v9 B
gbCanClose := True; + @) s5 w9 S% M# j& H/ | v
FrmMain.Free; - \: }2 e0 _) a/ j) K8 W/ iend; 6 P. K; }* P; [% m6 n, H