How to remove the standard glow from the program window in WPF?

Question

WPF

Every application has a standard border (or glow) - g.recordit.co/sqd4xGu7on.gif
When an application is inactive, it is white. When you select an app, it turns blue (I guess it depends on the OS theme color). The question is how to remove it ? As I understand it, this functionality has nothing to do with the border property. Just in case, I am attaching the markup code, although it should not affect anything:

<Window>
    <Grid>
        <TextBox"/>
    </Grid>
</Window>

Answer 1

The OS, not WPF, is responsible for the frame of standard windows,
but it can be changed or removed, read here:
https://docs.microsoft.com/en-us/dotnet/api/system...