BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TIdTCPClient Base Class          BorlandTalk.com Forum Index -> C++ Builder (Internet Socket) View previous topic :: View next topic   Author Message Curt Guest Posted: Fri Sep 09, 2005 2:25 am    Post subject: TIdTCPClient Base Class I am trying to derive a very simple class from TIdTCPClient but I get the error Unresolved external '__fastcall IdTcpclient::TIdTCPClient::SetPortA(const int)' referenced from c:...unit2.obj. Does anyone have any idea why I get this error ? Here are the steps I take: 1) New Application 2) New Unit 3) The following code in the new unit (.H and .C) .H //-------------------------------------------------------------------------- - #ifndef Unit2H #define Unit2H //-------------------------------------------------------------------------- - #include <winsock2> // just to cover for multiple fd_set error #include <IdBaseComponent.hpp> #include <IdComponent.hpp> #include <IdTCPClient.hpp> #include <IdTCPConnection.hpp> class TTest : public Idtcpclient::TIdTCPClient { public: __fastcall virtual TTest(Classes::TComponent* AOwner); }; #endif .C //-------------------------------------------------------------------------- - #pragma hdrstop #include "Unit2.h" //-------------------------------------------------------------------------- - #pragma package(smart_init) __fastcall TTest::TTest(Classes::TComponent* AOwner) : TIdTCPClient(AOwner) { }; Back to top Remy Lebeau (TeamB) Guest Posted: Fri Sep 09, 2005 3:40 am    Post subject: Re: TIdTCPClient Base Class "Curt" <noemailaddress> wrote Quote: Unresolved external '__fastcall IdTcpclient::TIdTCPClient::SetPortA(const int)' referenced from c:...unit2.obj. Known problem. It is a Win32 API "bug", not an Indy bug. winspool.h declares a #define statement that maps SetPort() to SetPortA() or SetPortW() depending on whether UNICODE is declared. #define statements are global, effecting the entire application. If you go to http://search.borland.com and http://www.deja.com and search for "SetPortA", you will see that this issue has been discussed many times before. Gambit Back to top Curt Guest Posted: Fri Sep 09, 2005 3:54 am    Post subject: Re: TIdTCPClient Base Class Thank you. "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote Quote: "Curt" <noemailaddress> wrote in message news:4320f1c9$1 (AT) newsgroups (DOT) borland.com... Unresolved external '__fastcall IdTcpclient::TIdTCPClient::SetPortA(const int)' referenced from c:...unit2.obj. Known problem. It is a Win32 API "bug", not an Indy bug. winspool.h declares a #define statement that maps SetPort() to SetPortA() or SetPortW() depending on whether UNICODE is declared. #define statements are global, effecting the entire application. If you go to http://search.borland.com and http://www.deja.com and search for "SetPortA", you will see that this issue has been discussed many times before. 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