In 4.6.X version of vpn client errors were defined in vpnapi.h. But in the above version it looks it has been moved to "VpnEnum.h" but i dont see any such file in include folder?
How this is missing in installation?
The below URL should contain the files that you are looking for. Specifically, the "VpnEnum.h" file.
*Pls rate if it helps*