I’m trying to set windowed mode to my app but, even using those nodes, it’s not working. The app keeps in FullScreen mode.
Can anyone help me?
The ResSet function is being called in BeginPlay.
Thanks.
Are you talking about play in editor? I beleive those nodes only work in packaged builds as they change the build settings.
Even after build i’m getting standard full screen. What else can I do? 
I found this, it may help. Also im not sure about the redundancy of your SaveSet function in your blueprint, it may be causing an issue. Have you tried calling apply settings and save settings immediately after setting the screen mode?
I tried commenting those ‘resolution’ lines and setting fullscreenmode as 2. Didn’t work.
Also tried calling apply and save right after set, didn’t work. But finally, i found the solution.
I’ve set also resolution to 800x600, since windows generated by UE have no borders i tought it would be the resolution. Worked.
Thanks for the help, man! 