BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  detect internet connection          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message Thebes Guest Posted: Sat Jun 28, 2003 6:18 pm    Post subject: detect internet connection hi... can we check internet connection avaible with aynway (adsl,cable dialup,lan etc.) without checking an internet adress? is tehere an api for this? or must I ping or finger a valid adress? Back to top Maynard Philbrook Guest Posted: Sat Jun 28, 2003 7:14 pm    Post subject: Re: detect internet connection There are problems detecting that. i have found it unreliable. if you perform a DNS it should work for you. if the users system uses a Dial up and its set for autodial then the socket system should initiate a dial up and when connected the call will return how ever, there is a problem here. if for some reason the dial up fails the next attempt will fail until you unload the Wsock DLL so that the host dial app will unload. or if you want you can use the EnumWindows to detect if this is the case and kill the app via a message and then try again. also if you look in the Current_USer key of the reg you will find the RemoteAccess info if it exists. also there is an API cal only on systems that uses IE 4.0+ i think its called InternetGetConnectionState you Need to use the WinInet unit.. how ever this call i have found to also be alittle unreliable. Look in the MSDN for Wininet APi., Thebes wrote: Quote: hi... can we check internet connection avaible with aynway (adsl,cable dialup,lan etc.) without checking an internet adress? is tehere an api for this? or must I ping or finger a valid adress? Back to top Ruggero Rossi Guest Posted: Mon Jun 30, 2003 6:58 am    Post subject: Re: detect internet connection In the wininet there is the function you need: InternetGetConnectedState function IsOnLine: boolean; var dwConnectionTypes : DWORD; begin dwConnectionTypes := INTERNET_CONNECTION_MODEM + INTERNET_CONNECTION_LAN + INTERNET_CONNECTION_PROXY; result := InternetGetConnectedState(@dwConnectionTypes,0); end; "Thebes" <t_h_e_b_e_s (AT) yahoo (DOT) com> ha scritto nel messaggio news:3efddbe3 (AT) newsgroups (DOT) borland.com... Quote: hi... can we check internet connection avaible with aynway (adsl,cable dialup,lan etc.) without checking an internet adress? is tehere an api for this? or must I ping or finger a valid adress? Back to top Francois Piette Guest Posted: Mon Jun 30, 2003 7:20 am    Post subject: Re: detect internet connection Quote: In the wininet there is the function you need: InternetGetConnectedState This function returns the settings from Internet Explorer and doesn't always reflect the truth... IMHO there is _NO_ universal way to know programmatically how the user is connectect to the internet without asking the user (and using IE settings is asking the user indirectly). -- Contribute to the SSL Effort. Visit http://overbyte.delphicenter.com/eng/ssl.html -- [email]francois.piette (AT) overbyte (DOT) be[/email] Author of ICS (Internet Component Suite, freeware) Author of MidWare (Multi-tier framework, freeware) http://www.overbyte.be "Ruggero Rossi" <ruggero.maria.rossi (AT) libero (DOT) it> a écrit dans le message de news:3effdfa4$1 (AT) newsgroups (DOT) borland.com... Quote: In the wininet there is the function you need: InternetGetConnectedState function IsOnLine: boolean; var dwConnectionTypes : DWORD; begin dwConnectionTypes := INTERNET_CONNECTION_MODEM + INTERNET_CONNECTION_LAN + INTERNET_CONNECTION_PROXY; result := InternetGetConnectedState(@dwConnectionTypes,0); end; "Thebes" <t_h_e_b_e_s (AT) yahoo (DOT) com> ha scritto nel messaggio news:3efddbe3 (AT) newsgroups (DOT) borland.com... hi... can we check internet connection avaible with aynway (adsl,cable dialup,lan etc.) without checking an internet adress? is tehere an api for this? or must I ping or finger a valid adress? Back to top Ruggero Rossi Guest Posted: Tue Jul 01, 2003 4:09 pm    Post subject: Re: detect internet connection "Francois Piette" <francois.piette (AT) overbyte (DOT) be> ha scritto nel messaggio news:3effe4b4 (AT) newsgroups (DOT) borland.com... Quote: In the wininet there is the function you need: InternetGetConnectedState This function returns the settings from Internet Explorer and doesn't always reflect the truth... Is it? This function, as in msdn documentation, "Retrieves the connected state of the local system", not "connection settings". I tried this funcion with and without connection, and the return value was different. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wininet/win inet/internetgetconnectedstate.asp Hi, Ruggero .... Back to top Francois PIETTE Guest Posted: Tue Jul 01, 2003 4:37 pm    Post subject: Re: detect internet connection Quote: In the wininet there is the function you need: InternetGetConnectedState This function returns the settings from Internet Explorer and doesn't always reflect the truth... Is it? This function, as in msdn documentation, "Retrieves the connected state of the local system", not "connection settings". I tried this funcion with and without connection, and the return value was different. Yes but you have IE with correct settings. Change the setting of IE, setting something incorrect, then you'll see the function return a wrong result. So the connected state only reflect IE settings. If your application runs on a systel where IE is not correctly configured (for example because the user is using Mozilla and don't care about IE) then your program will not work as expected. But maybe I'm wrong... -- Contribute to the SSL Effort. Visit http://overbyte.delphicenter.com/eng/ssl.html -- [email]francois.piette (AT) overbyte (DOT) be[/email] The author for the freeware multi-tier middleware MidWare The author of the freeware Internet Component Suite (ICS) http://www.overbyte.be Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Internet Winsock All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.