Microsoft has begun to develop Windows 11 22H2 which is expected to be released in the fall of 2022. As part of the Windows 11 22H2 version, Microsoft will improve the interface of the current operating system by introducing more applications using different frameworks into Mica+Fluent.

Fluent Design is part of the design language of Windows 11 and Windows 10, which replaces the monotonous appearance of Windows 8 by using light and depth elements. It is similar to Acrylic in design, which is a translucent material used for menus, dialog box backgrounds, or entire application windows.
In Windows 11, Microsoft added a new material to its Fluent design language, namely Mica. This is also a semi-transparent fuzzy design that can make your desktop wallpaper glow in the application window. To a certain extent, it can also achieve the Aero frosted glass effect similar to Windows 7 Acrylic.
The transparency effect of mica can be automatically adjusted in the power saving mode or when the device speed is too slow (the hardware is too old), so it achieves a faster and smoother effect while maintaining the advantages of acrylic material.
Mica material of Windows 11 is currently not compatible with all modern applications, but it will change as soon. However, Microsoft plans to use Mica to the FrameHostTitlebar label of modern applications and even traditional applications.
Mica dark mode
Mica is now existed in the core application of the Windows 11 preview version of Build 22509 or higher, but some modern programs cannot be built with Mica. But Microsoft seems to be testing the MicaBackdropInApplicationFrameHostTitlebar tag (this has been confirmed in the updated version).
As the name suggests, this label covers Win11’s Mica effect in applications such as Feedback Hub, such as the title bar. Thanks to this, users can get some additional UI optimizations without downloading the update package from the Microsoft Store.
New material
Interestingly, Microsoft seems to be experimenting with another design material called Tabbed. This material seems to be an optimized product based on mica, or it may be a version of mica.
In the Win32 API of the Windows 11 Build 22523 SDK, users have discovered new and strange “tag” design materials.


