BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How can I read the netmask of my network using Delphi7?          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message Bo Berglund Guest Posted: Tue Feb 14, 2006 12:03 am    Post subject: How can I read the netmask of my network using Delphi7? I want to find out on which network the PC which runs my software is connected. Specifically I need to find the netmask value. I know how to get the IP address, but not the netmask. The reason is that I want to connect to a perticular port server (hardware gadget) on the network and I can broadcast a UDP command to make them all report their presence. This way I can get their IP address and a name property too. But in order to reach them by TCP socket communication I need to verify if their IP address is actually within my own PC:s network. This will be done by anding the IP address of the portserver (received from the broadcast) and the IP of my own PC with the netmask and compare the results. If they are the same then I can go ahead and work with the port server. So the netmask is important to retrieve, but how? I use the Indy 9 UDP client component to broadcast the report command. Is there a way using Windows API or Indy9 to retrieve the netmask on my own PC? /Bo Back to top Remy Lebeau (TeamB) Guest Posted: Tue Feb 14, 2006 12:03 am    Post subject: Re: How can I read the netmask of my network using Delphi7? "Bo Berglund" <bo.berglund (AT) telia (DOT) com> wrote in message news:4n42v114u4fa3no3gv593lgce6tvligu5a (AT) 4ax (DOT) com... Quote: I want to find out on which network the PC which runs my software is connected. You have to query the network adapters directly for that. Look at the GetAdaptersInfo() function in the Win32 API: GetAdaptersInfo http://msdn.microsoft.com/library/en-us/iphlp/iphlp/getadaptersinfo.asp Quote: Is there a way using Windows API or Indy9 to retrieve the netmask on my own PC? There is nothing in Indy for that. 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