I also faced a similar issue. I tried to compile the sofia sip code to create 
the library and then link the generated lib to my application. I got these 
errors when trying to compile the sofia sip code. I am not able to completely 
re-collect how I fixed this, but give this a try. Hope this helps you.

1. In order to compile the code with Windows 2000 SDK you have to install so 
called "IPv6 Technology Preview for Windows 2000". The preview contains updated 
IPv6 API in <tpipv6.h> and <wspiapi.h> header files.
http://msdn.microsoft.com/downloads/sdks/platform/tpipv6.asp

I used visual studio .net 2003.

2.  Open the .\sofia-sip\win32\SofiaSIP.dsw to open the complete list of 
projects. This includes sofia sip library project (DLLs & static libraries) and 
few test programs.

3. The following paths to be added to the list of include directories
.\libsofia-sip-ua\bnf
.\libsofia-sip-ua\http
.\libsofia-sip-ua\ipt
.\libsofia-sip-ua\iptsec
.\libsofia-sip-ua\msg
.\libsofia-sip-ua\nea
.\libsofia-sip-ua\nta
.\libsofia-sip-ua\nth
.\libsofia-sip-ua\nua
.\libsofia-sip-ua\sdp
.\libsofia-sip-ua\sip
.\libsofia-sip-ua\soa
.\libsofia-sip-ua\sresolv
.\libsofia-sip-ua\stun
.\libsofia-sip-ua\su
.\libsofia-sip-ua\tport
.\libsofia-sip-ua\url
.\win32\pthread

4. Add libraries ws2_32.lib & Iphlpapi.lib to the dependency list

--
Subbu


-----Original Message-----
From: Francesco Lamonica [mailto:[EMAIL PROTECTED]
Sent: Monday, September 22, 2008 2:05 PM
To: sofia-sip-devel Mailing List
Subject: Re: [Sofia-sip-devel] Problem compiling a little application with 
visual studio 2005

Hi Stefano,
I am no VS2005 expert either but i had a few problems on lib
dependencies as well, what windows lib are you linking against right
now? (you can check it in the project properties under the LINKER
section)

On Thu, Sep 18, 2008 at 5:27 PM, Stefano Sabatini <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> I'm getting this building problems when compiling a little application
> with Visual Studio 2005 on Windows Vista which links against
> libsofia-sip (last checkout, 1.12.9).
>
> I got so far to compile libsofia-ua for win32 without hassles.
>
> These are the errors I get when compiling:
>
> 1>Linking...
> 1>   Creating library .\Debug/sip_options_static.lib and object 
> .\Debug/sip_options_static.exp
> 1>libsofia_sip_ua_static.lib(sres.obj) : error LNK2019: unresolved external 
> symbol [EMAIL PROTECTED] referenced in function _sres_parse_win32_ip
> 1>libsofia_sip_ua_static.lib(sres.obj) : error LNK2019: unresolved external 
> symbol [EMAIL PROTECTED] referenced in function _sres_parse_win32_reg
> 1>libsofia_sip_ua_static.lib(sres.obj) : error LNK2019: unresolved external 
> symbol [EMAIL PROTECTED] referenced in function _sres_parse_win32_reg
> 1>libsofia_sip_ua_static.lib(sres.obj) : error LNK2019: unresolved external 
> symbol [EMAIL PROTECTED] referenced in function 
> _sres_parse_win32_reg_parse_dnsserver
> 1>libsofia_sip_ua_static.lib(su_localinfo.obj) : error LNK2019: unresolved 
> external symbol [EMAIL PROTECTED] referenced in function _win_localinfo
> 1>.\Debug/sip_options_static.exe : fatal error LNK1120: 5 unresolved externals
> 1>Build log was saved at 
> "file://c:\Users\fooobar\Documents\programmi\sofia-sip-1.12.9\win32\utils\sip_options_static\Debug\BuildLog.htm"
> 1>sip_options_static - 6 error(s), 0 warning(s)
>
> I think the problem derives from some missing libs/DLLs, can you
> suggest how to fix the problem (for example which are the libs/DLLs
> I'm missing if that's the case)?
>
> (Sorry I'm definitively not a Visual Studio expert).
>
> Many thanks in advance, best regards.
>
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