@anonymous_user_1267f45c - the samples are written against the standard C++ version of XSAPI (headers + static lib, usable from C++ only), rather than its WinRT projection (winmd + dll, usable from any WinRT language). The appearance is slightly different because each version conforms to the typical style of its target platform, so XSAPI C++ looks rather like something you might see in std::, whereas XSAPI WinRT looks much like WinRT components in the Windows SDK. It is certainly possible that the difference is a source of bugs, but it’s not that one version is right and the other is wrong. OnlineSubsystemLive is set up to use the WinRT version, and switching would require substantial modifications to the existing code.
@Sparkash - that does look very much like an older version of the UI. The relevant code is mostly here. That should then get compiled into UE4Editor-UWPPlatformEditor.dll. Seems like there must be something stale somewhere there. That said, if you’ve got something working now it might not be worth tracking down the problem. The stuff you’re missing is primarily changes intended to make it easier to get started.
@MaSe87 - I’d recommend taking a look at the dev_MixedReality branch. There’s lots of work going on in there, but it should have some of the basics for developing a app in place.