delphi创建具有托盘的服务程序(service)
Windows 2000/XP和2003等支持一种叫做"服务程序"的东西.程序作为服务启动有以下几个好处:
(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:
[delphi] view plaincopy
- 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.
[delphi] view plaincopy
- 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:
[delphi] view plaincopy
- 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; {窗口最前}
- SetWindowLong(Application.Handle, GWL_EXSTYLE, WS_EX_TOOLWINDOW); {不在任务栏显示}
- 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.
- program ServiceDemo;
- uses
- SvcMgr,
- Unit_Main in ‘Unit_Main.pas‘ {DelphiService: TService},
- Unit_frmMain in ‘Unit_frmMain.pas‘ {frmMain};
- {$R *.RES}
- begin
- Application.Initialize;
- Application.CreateForm(TDelphiService, DelphiService);
- Application.Run;
- end.
[delphi] view plaincopy
- 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; {窗口最前}
- SetWindowLong(Application.Handle, GWL_EXSTYLE, WS_EX_TOOLWINDOW); {不在任务栏显示}
- 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.
- program ServiceDemo;
- uses
- SvcMgr,
- Unit_Main in ‘Unit_Main.pas‘ {DelphiService: TService},
- Unit_frmMain in ‘Unit_frmMain.pas‘ {frmMain};
- {$R *.RES}
- begin
- Application.Initialize;
- Application.CreateForm(TDelphiService, DelphiService);
- Application.Run;
- end.
窗体代码如下:
[delphi] view plaincopy
- object DelphiService: TDelphiService
- OldCreateOrder = False
- DisplayName = ‘Delphi服务演示程序‘
- Interactive = True
- OnContinue = ServiceContinue
- OnExecute = ServiceExecute
- OnPause = ServicePause
- OnShutdown = ServiceShutdown
- OnStart = ServiceStart
- OnStop = ServiceStop
- Left = 261
- Top = 177
- Height = 150
- Width = 215
- end
- object frmMain: TfrmMain
- Left = 192
- Top = 107
- Width = 696
- Height = 480
- Caption = ‘我的服务测试程序‘
- Color = clBtnFace
- Font.Charset = DEFAULT_CHARSET
- Font.Color = clWindowText
- Font.Height = -11
- Font.Name = ‘MS Sans Serif‘
- Font.Style = []
- OldCreateOrder = False
- OnCloseQuery = FormCloseQuery
- OnCreate = FormCreate
- OnDestroy = FormDestroy
- PixelsPerInch = 96
- TextHeight = 13
- object Button1: TButton
- Left = 296
- Top = 264
- Width = 75
- Height = 25
- Caption = ‘Button1‘
- TabOrder = 0
- OnClick = Button1Click
- end
- object Timer1: TTimer
- OnTimer = Timer1Timer
- Left = 120
- Top = 192
- end
- end
[delphi] view plaincopy
- object DelphiService: TDelphiService
- OldCreateOrder = False
- DisplayName = ‘Delphi服务演示程序‘
- Interactive = True
- OnContinue = ServiceContinue
- OnExecute = ServiceExecute
- OnPause = ServicePause
- OnShutdown = ServiceShutdown
- OnStart = ServiceStart
- OnStop = ServiceStop
- Left = 261
- Top = 177
- Height = 150
- Width = 215
- end
- object frmMain: TfrmMain
- Left = 192
- Top = 107
- Width = 696
- Height = 480
- Caption = ‘我的服务测试程序‘
- Color = clBtnFace
- Font.Charset = DEFAULT_CHARSET
- Font.Color = clWindowText
- Font.Height = -11
- Font.Name = ‘MS Sans Serif‘
- Font.Style = []
- OldCreateOrder = False
- OnCloseQuery = FormCloseQuery
- OnCreate = FormCreate
- OnDestroy = FormDestroy
- PixelsPerInch = 96
- TextHeight = 13
- object Button1: TButton
- Left = 296
- Top = 264
- Width = 75
- Height = 25
- Caption = ‘Button1‘
- TabOrder = 0
- OnClick = Button1Click
- end
- object Timer1: TTimer
- OnTimer = Timer1Timer
- Left = 120
- Top = 192
- end
- end
如何加入自己服务程序的“描述”内容呢?
目前基本有两种方法:
1、修改注册表,在
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet001\Services下找到自己的服务名称键值,然后加入一个名为Description的字符串字段,字段内容就是描述的内容。
这种方法通过实验是有效的,但因为不是通过API实现,而是直接写注册表,不太清楚适用性如何,不同的系统不知是否通用。
2、可通过ChangeServiceConfig2函数实现对服务的描述的修改。网上的ChangeServiceConfig2函数举例都根本无法成功运行,通过摸索改进,现提供ChangeServiceConfig2的正确用法如下,可成功有效地修改服务程序的描述。
程序代码
var
sdBuf: SERVICE_DESCRIPTION;
hSCManager, ServiceHandle: SC_Handle;
begin
hSCManager := OpenSCManager(nil, SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_Access);
if hSCManager<>0 then
try
ServiceHandle := OpenService(hSCManager, PChar(ShutDownMonService.Name), SERVICE_CHANGE_CONFIG);
if ServiceHandle<>0 then
try
sdBuf.lpDescription := ‘我们的描述写在这里。‘;
ChangeServiceConfig2(ServiceHandle, SERVICE_CONFIG_DESCRIPTION, @sdBuf);
finally
CloseServiceHandle(ServiceHandle);
end;
finally
CloseServiceHandle(hSCManager);
end;
end;
以上的代码建议加在Service的AfterInstall事件中,当服务安装成功后自动对描述进行修改。一次性即可。
注意需要引用WinSvc, WinSvcEx两个单元,其中WinSvcEx的内容如下
程序代码
unit WinSvcEx;
interface
uses Windows, WinSvc;
const
//
// Service config info levels
//
SERVICE_CONFIG_DESCRIPTION = 1;
SERVICE_CONFIG_FAILURE_ACTIONS = 2;
//
// 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.
另外delphi 自带的Delphi带了个例子,在source/vcl目录上有个ScktSrvr.dpr
有GUI的Service程序,写Service一般是按照这个方法来做。这样调试起来更方便。