In Windows 11, the Windows Basic (non-Aero) style is still present in some places. The form when shown in the Visual Studio Designer, as well as in MDI applications, shows the Windows 7-style Windows Basic theme. You can make this style appear for any application you want by enabling Windows XP compatibility mode for that program, and it will display the Windows Basic style for just that program, but the problem is that it has to be run in XP compatibility mode and as admin. Is it possible to disable DWM/Aero styles programmatically for just one form or program? I tried P/Invoking DwmEnableComposition(), but the problem is that it no longer works on Windows 8 and up according to the Microsoft documentation, and even if it worked, it disables DWM for the entire desktop, not for just one program or form.