UE4 VR mode fullscreen 4.13

Previously wrote a 4.11 version full screen, high version of useless so also not clear the situation, recently out of 4.13, just the new project to be packaged out later found that the console command fullscreen no use,

Replaced by stereo on, but still no full screen, visually deduced to put the following character in the project directory/config/defaulteditorperprojectusersettings.ini inside.

[/script/engine.gameusersettings]
Busevsync=false
resolutionsizex=1280
resolutionsizey=1024
lastuserconfirmedresolutionsizex=1280
lastuserconfirmedresolutionsizey=1024
Windowposx=-1
Windowposy=-1
Busedesktopresolutionforfullscreen=true
Fullscreenmode=0
Lastconfirmedfullscreenmode=0
Version=5

Currently can full screen but there is black edge, because did not go to download 4.13 of the source, just guess the way to black side should and my last write how full-screen post is the same step.

My system is WIN10 64.

UE4 VR mode fullscreen 4.13