delphi,c++程序 阻止Win11 用户更改系统时间
如果软件需要用系统时间,当用户改了后,会出问题,如何阻止呢,其实就是
W32Time服务,重启下就ok了
c++自己实现下
RestartService('W32Time',10000);
usesWinSvc, Windows;// 获取服务状态(返回状态常量:SERVICE_RUNNING/SERVICE_STOPPED等)
function GetServiceStatus(ServiceName: string): DWORD;
varSCMgr, hService: SC_HANDLE;Status: TServiceStatus;
beginResult := 0;SCMgr := OpenSCManager(nil, nil, SC_MANAGER_CONNECT);if SCMgr <> 0 thenbeginhService := OpenService(SCMgr, PChar(ServiceName), SERVICE_QUERY_STATUS);if hService <> 0 thenbeginQueryServiceStatus(hService, Status);Result := Status.dwCurrentState; // 返回当前状态CloseServiceHandle(hService);end;CloseServiceHandle(SCMgr);end;
end;// 停止服务(含超时等待)
function StopService(ServiceName: string; TimeoutSec: Integer): Boolean;
varSCMgr, hService: SC_HANDLE;Status: TServiceStatus;i: Integer;
beginResult := False;SCMgr := OpenSCManager(nil, nil, SC_MANAGER_ALL_ACCESS);if SCMgr = 0 then Exit;hService := OpenService(SCMgr, PChar(ServiceName), SERVICE_STOP or SERVICE_QUERY_STATUS);if hService <> 0 thentry// 若服务正在运行则停止if GetServiceStatus(ServiceName) = SERVICE_RUNNING thenbeginControlService(hService, SERVICE_CONTROL_STOP, Status);i := 0;// 等待服务停止完成while (i < TimeoutSec) and (GetServiceStatus(ServiceName) <> SERVICE_STOPPED) dobeginSleep(1000);Inc(i);end;Result := (GetServiceStatus(ServiceName) = SERVICE_STOPPED);endelseResult := True; // 服务已停止finallyCloseServiceHandle(hService);CloseServiceHandle(SCMgr);end;
end;// 启动服务
function StartService(ServiceName: string): Boolean;
varSCMgr, hService: SC_HANDLE;s: pchar;
beginResult := False;SCMgr := OpenSCManager(nil, nil, SC_MANAGER_ALL_ACCESS);if SCMgr = 0 then Exit;hService := OpenService(SCMgr, PChar(ServiceName), SERVICE_START);if hService <> 0 thentryResult := WinSvc.StartService(hService, 0, s);// 若服务已在运行也视为成功if not Result and (GetLastError = ERROR_SERVICE_ALREADY_RUNNING) thenResult := True;finallyCloseServiceHandle(hService);CloseServiceHandle(SCMgr);end;
end;// 重启服务(核心函数)
function RestartService(ServiceName: string; TimeoutSec: Integer): Boolean;
beginResult := False;// 先停止服务(超时由TimeoutSec控制)if StopService(ServiceName, TimeoutSec) thenResult := StartService(ServiceName); // 停止成功后启动
end;