Delphi编写系统服务三：编写两栖系统服务 收藏
采用下面的方法，可以实现一个两栖系统服务（既系统服务和桌面程序的两种模式）
工程代码：
program FleetReportSvr;
uses
SvcMgr,
Forms,
SysUtils,
Windows,
SvrMain in 'SvrMain.pas' {FleetReportService: TService},
AppMain in 'AppMain.pas' {FmFleetReport}；
{$R *.RES}
const
CSMutexName = 'Global\Services_Application_Mutex';
var
OneInstanceMutex: THandle;
SecMem: SECURITY_ATTRIBUTES;
aSD: SECURITY_DESCRIPTOR;
begin
InitializeSecurityDescriptor(@aSD, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(@aSD, True, nil, False);
SecMem.nLength := SizeOf(SECURITY_ATTRIBUTES);
SecMem.lpSecurityDescriptor := @aSD;
SecMem.bInheritHandle := False;
OneInstanceMutex := CreateMutex(@SecMem, False, CSMutexName);
if (GetLastError = ERROR_ALREADY_EXISTS)then
begin
DlgError('Error, Program or service already running!');
Exit;
end;
if FindCmdLineSwitch('svc', True) or
FindCmdLineSwitch('install', True) or
FindCmdLineSwitch('uninstall', True) then
begin
SvcMgr.Application.Initialize;
SvcMgr.Application.CreateForm(TSvSvrMain, SvSvrMain);
SvcMgr.Application.Run;
end
else
begin
Forms.Application.Initialize;
Forms.Application.CreateForm(TFmFmMain, FmMain);
Forms.Application.Run;
end;
end.
然后在SvrMain注册服务：
unit SvrMain;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, SvcMgr, Dialogs, MsgCenter;
type
TSvSvrMain = class(TService)
procedure ServiceStart(Sender: TService; var Started: Boolean);
procedure ServiceStop(Sender: TService; var Stopped: Boolean)
