Windowed fullscreen not fullscreen

[Jzpk 1]

Hello!

I'm having trouble getting windowed mode work with fullscreen, I don't get it to be fullscreen. I'm running 1920 - 1080 on the monitor I'm gaming on and when I set it to that using;

WinX=0;

WinY=0;

WinW=1920;

WinH=1080;

WinDefW=1920;

WinDefH=1080;

It doesn't make the window fullscreen, it doesn't go all the way down on the monitor and I get a border on my secondary monitor. Is there a way to get it into a proper windowed fullscreen without the border and filling the whole monitor?