delphi 创建一个服务程序

{Delphi NT Service Skeleton by Aphex}
{这是一个NT服务程序的例子，如果你只想添加成服务启动即伪服务的话就不必这样麻烦了}

program Service;

uses
Windows,WinSvc;

const
ServiceName: pchar = 'a Service';
DisplayName: pchar = 'a Demo Service';
Description:pchar = '服务演示程序';
var
Status: TServiceStatus;
StatusHandle: SERVICE_STATUS_HANDLE;
ServiceTable: array[0..1] of TServiceTableEntry;
Stopped: boolean;
Paused: boolean;
{我们自己要实现的功能代码写在这里}
procedure ServiceMain;
begin
repeat
    if not Paused then
    begin
      // Beep(1000, 1000);
      Sleep(1000);
    end;
until Stopped;
end;
{服务处理程序：一个服务处理程序内可以包含一个服务或多个服务的执行代码，但是它们都拥有固定的三个部分：服务main函数，服务ServiceMain函数和服务Control Handler函数。
服务配置程序：服务配置程序包括：服务的创建、服务的卸载、服务信息的查询、修改等；}

procedure ServiceCtrlHandler(Control: dword); stdcall; //服务控制函数
begin
case Control of
    SERVICE_CONTROL_STOP: //停止服务
      begin
        Stopped := True;
        Status.dwCurrentState := SERVICE_STOP_PENDING;
        SetServiceStatus(StatusHandle, Status);
      end;
    SERVICE_CONTROL_PAUSE: //暂停服务
      begin
        Paused := True;
        Status.dwcurrentstate := SERVICE_PAUSED;
        SetServiceStatus(StatusHandle, Status);
      end;
    SERVICE_CONTROL_CONTINUE: //继续服务
      begin
        Paused := False;
        Status.dwCurrentState := SERVICE_RUNNING;
        SetServiceStatus(StatusHandle, Status);
      end;
    SERVICE_CONTROL_INTERROGATE: SetServiceStatus(StatusHandle, Status);
    SERVICE_CONTROL_SHUTDOWN: Stopped := True;
end;
end;

procedure ServiceCtrlDispatcher(dwArgc: dword; var lpszArgv: pchar); stdcall;
begin
StatusHandle := RegisterServiceCtrlHandler(ServiceName, @ServiceCtrlHandler);
if StatusHandle <> 0 then
begin
    ZeroMemory(@Status, SizeOf(Status));
    Status.dwServiceType := SERVICE_WIN32_OWN_PROCESS or
      SERVICE_INTERACTIVE_PROCESS;
    Status.dwCurrentState := SERVICE_START_PENDING;
    Status.dwControlsAccepted := SERVICE_ACCEPT_STOP or
      SERVICE_ACCEPT_PAUSE_CONTINUE;
    Status.dwWaitHint := 1000;
    SetServiceStatus(StatusHandle, Status);
    Stopped := false;
    Paused := False;
    Status.dwCurrentState := SERVICE_RUNNING;
    SetServiceStatus(StatusHandle, Status);
    ServiceMain;//入口
    Status.dwCurrentState := SERVICE_STOPPED;
    SetServiceStatus(StatusHandle, Status);
end;
end;

procedure UninstallService(ServiceName: pchar);
var
SCManager: SC_HANDLE;
Service: SC_HANDLE;
begin
SCManager := OpenSCManager(nil, nil, SC_MANAGER_ALL_ACCESS);
if SCManager = 0 then
    Exit;
try
    Service := OpenService(SCManager, ServiceName, SERVICE_ALL_ACCESS);
    ControlService(Service, SERVICE_CONTROL_STOP, Status);
    DeleteService(Service);
    CloseServiceHandle(Service);
finally
    CloseServiceHandle(SCManager);
end;
end;
///////////////////
{添加一个服务的描述信息,你是否采用了更简洁的方法,这是一个例子}
function SetServiceDescription(SH: THandle; Desc: PChar): Bool;
const
SERVICE_CONFIG_DESCRIPTION: DWord = 1;
var
OSVersionInfo: TOSVersionInfo;
ChangeServiceConfig2: function(hService: SC_HANDLE; dwInfoLevel: DWORD;
    lpInfo: Pointer): Bool; StdCall;
LH: THandle;
begin
Result :=false;
OSVersionInfo.dwOSVersionInfoSize := SizeOf(OSVersionInfo);
GetVersionEx(OSVersionInfo);
if (OSVersionInfo.dwPlatformId = VER_PLATFORM_WIN32_NT) and //NT? 环境判断 ，可以去掉
    (OSVersionInfo.dwMajorVersion >= 5) then
begin
    LH := GetModuleHandle(advapi32);
    Result := LH <> 0;
    if not Result then
      Exit;
    ChangeServiceConfig2 := GetProcAddress(LH, 'ChangeServiceConfig2A');
    Result := @ChangeServiceConfig2 <> nil;
    if not Result then
      Exit;
    Result := ChangeServiceConfig2(SH, SERVICE_CONFIG_DESCRIPTION, @Desc);
    {if Result then
      FreeLibrary(LH); }
end;
end;

procedure InstallService(ServiceName, DisplayName,Description: pchar; FileName:
string);
const
SERVICE_CONFIG_DESCRIPTION: DWord = 1;
var
SCManager: SC_HANDLE;
Service: SC_HANDLE;
Args: pchar;
begin
SCManager := OpenSCManager(nil, nil, SC_MANAGER_ALL_ACCESS);
if SCManager = 0 then
    Exit;
try
    Service := CreateService(SCManager, ServiceName, DisplayName,
      SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS or
      SERVICE_INTERACTIVE_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_IGNORE,
      pchar(FileName), nil, nil, nil, nil, nil);
    try
      SetServiceDescription(Service, Description);
    except
    end;
    Args := nil;
    StartService(Service, 0, Args);
    CloseServiceHandle(Service);
finally
    CloseServiceHandle(SCManager);
end;
end;

begin
if ParamStr(1) = '/u' then
begin
    UninstallService(ServiceName);
end
else
begin
   ServiceTable[0].lpServiceName := ServiceName;
    ServiceTable[0].lpServiceProc := @ServiceCtrlDispatcher;
    ServiceTable[1].lpServiceName := nil;
    ServiceTable[1].lpServiceProc := nil;
    StartServiceCtrlDispatcher(ServiceTable[0]);
    CopyFile(pchar(ParamStr(0)), pchar('c:\demo.exe'), False);
    InstallService(ServiceName, DisplayName, Description, pchar('c:\demo.exe'));
end;
end.

在 运行 里面输入 c:\demo.exe /u 即可卸载这个服务演示程序。