[Winpcap-users] Entry Point in a DLL

[Thomas O'Hare]

FWIW, put it in your own "h" file for that part of your project.  That
should declare it or prototype it for use.

Thanks,
~ Thomas O'Hare ~
President, RedTile, Inc. - DBA: RedTile Software
Web, Wireless, Network, Database & Systems Software
+1.407.295.9148 ; +49.8651.717950 ; http://www.RedTile.Com/
Operations Manager; Virtual FoxPro User Group
Tom at VFUG.Org ; http://www.VFUG.Org/


George S. Lockwood wrote:
> Here's an example:
> 
> CWPA.obj : error LNK2001: unresolved external symbol "void __cdecl
> wpa_cli_cleanup(void)" (?wpa_cli_cleanup@@YAXXZ).
> 
> this comes from putting a call to wpa_cli_cleanup() in the destructor of
> the
> class I'm trying to make.  It is not a call to winpcap's dlls but to
> wpa_cli
> code C code (actually to its .objs).
> 
> george
> 
> On 8/6/06, Gianluca Varenni <gianluca.varenni at cacetech.com> wrote:
>>
>>  WinPcap can be used within a C++ application without any problem, you
>> don't need extern "C" or similar stuff.
>>
>> What is the exact linking error you are encountering?
>>
>> Have a nice day
>> GV
>>
>> ----- Original Message -----
>> *From:* George S. Lockwood <gslockwood at gmail.com>
>> *To:* Tom at redtile.com ; winpcap-users at winpcap.org
>> *Sent:* Saturday, August 05, 2006 11:28 AM
>> *Subject:* Re: [Winpcap-users] Entry Point in a DLL
>>
>> Hello Thomas,
>>
>> I think I'm trying to do something similar but with a standard library I
>> (think) am statically linking.  I'm getting link errors about unresolved
>> externals.  I am try to build the wpa_cli into a class.
>>
>> I think my problem is about a class (cpp) file not understanding a lib
>> build from straight "C" and thereby not finding a c style functions.
>>
>> Either I'm getting forgetful (very possible), or involved with .net too
>> much too recently to remember (also possible) that I'm forgeting the
>> way to
>> link C-style functions into a cpp module and call those external
>> functions.
>>
>> What am I forgetting?? Or am I forgetting that it is impossible.  I
>> thought I needed to declare the externals with something like __decl
>> or with
>> "C"    inside the cpp file???????
>>
>>
>>
>>
>> thanks for any of your ideas,
>>
>> george
>>
>> On 8/3/06, Thomas O'Hare <Tom at redtile.com> wrote:
>> >
>> > Hello All!
>> >
>> > I am using Dev-C++ in C++ mode to try and create an entry point into my
>> > own DLL's based on the WinPCap Libraries.  I need to export several of
>> > my own functions to languages that do not inherently support C typed
>> > structures.
>> >
>> > I am looking for the cleanest, fasted way to create an entry point for
>> > my functions so I can use the DLL as a true library for the programming
>> > languages lacking native structure support.
>> >
>> > I can open DLL's in these languages and call functions, but especially
>> > "chained" (Next) structures are very very tricky to work with in any
>> > language that does not have native support for C typed structures.
>> >
>> > Any docs, resources, suggestions, etc, are welcome.
>> > --
>> >
>> > Thanks,
>> > ~ Thomas O'Hare ~
>> > President, RedTile, Inc. - DBA: RedTile Software
>> > Web, Wireless, Network, Database & Systems Software
>> > +1.407.295.9148 ; +49.8651.717950 ; http://www.RedTile.Com/
>> > Operations Manager; Virtual FoxPro User Group
>> > Tom at VFUG.Org ; http://www.VFUG.Org/
>> > _______________________________________________
>> > Winpcap-users mailing list
>> > Winpcap-users at winpcap.org
>> > https://www.winpcap.org/mailman/listinfo/winpcap-users
>> >
>>
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>>
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> 
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