> Visual Studio 2005 Professional Service Pack 1 (_MSC_VER 1400) yes, it should work :) i was asking coz in VS2005 Express Edition Pocket PC SDK doesnt work . did it import the project file successfully? did you import wince_demos.vcw file form pjsip-apps\build\wince-evc4\wince_demos.vcw if not then open VS >> File >> Open >> Project/Solution >> brouse & select wince_demos.vcw >> open, it will ask to convert , click yes to all.., now from solution explorer select pjsua_wince and build it. btw what version of DirectX SDK you are using? my version is AUG 2007. atik