Windows Forms window changes its size when I create a WPF window

Question

I have a System.Window.Forms.Form where I handle every button click. When I receive the first event I create a new WPF System.Windows.Window object

Answer 1

As stated in other replies that is because of the DPI awareness. A quick fix to turn it off for those using VB.NET:

Open the app.manifest

And then uncomment this part and set the DPI awareness to false:

Note that this might cause your application's fonts to look more blurry on higher DPI devices.