how to compile skypekit libs: 1) download skypekit from skype site. 2) create folders structure like this: d:\MirandaNG d:\SkypeKit d:\SkypeKit\SDK 3) extract skypekit archive in d:\SkypeKit\SDK. You need have structure like this: d:\SkypeKit\SDK\bin d:\SkypeKit\SDK\buildfiles d:\SkypeKit\SDK\examples etc. 4) download and install cmake from here: http://www.cmake.org/ 5) start d:\SkypeKit\SDK\build_all.bat and wait when it finished. 6) go to d:\SkypeKit\SDK\build_all_cmake\build_cmake\ and copy skypekit.sln to skypekit_libs.sln 7) run skypekit_libs.sln and remove all not needed projects, you need save only: reference_opengl_lib skypekit-avtransport skypekit-cppwrapper_2_lib skypekit-cyassl_lib skypekit-ipccpp skypekit-videobuffers skypekit-voicepcm 8) edit each project: 8.1) remove not needed configurations: select solution skypekit_libs open Configuration Manager remove MinSizeRel and RelWithDebInfo configurations from solution and each projects 8.2) add x64 platform: add new platform x64 with coping settings from Win32 select item create new platform for projects 8.3) change in each projects lib output name by adding _x86 or _x64 at the end. depends on selected platform 8.3.1) need to copy Output directory from Win32 configuration and for Win32 add Intermediate directory _x86 and for x64 add _x64 8.3.2) for vc2012 need to set Platform Toolset to Visual Studio 2012 - Windows XP (v110_xp) 8.3.3) for x64 platform edit Preprocessor by changing 32 to 64 8.3.4) edit C/C++-Output files- pdb file name. I set default for parent name 9) try to compile full solution you need to create Original_key.h with defining like that #define MY_KEY "MY_KEY" then you need create keypair.bin file. for this you need: 1) download keypair.crt from skype site and put in to d:\SkypeKit\keypair.crt 2) compile keypacker utility from here: d:\MNG orig\protocols\Skype\keypacker\. No difference debug or release. 3) copy keypacker.exe to d:\SkypeKit\ and run it. Utility create 3 files: keypair.bin and keypair.crt.decrypted and key.h Now you can compile Skype protocol.