Windows-Form Customized Top Border Design

Greetings dear reader. What does the thicker transparent top border of some specific windows-itself programs call? Is it open for everyone to code and create some? Is additional options open to all like office-button, custom minimize, help etc. buttons and/or back, forward search-box controls STILL on a transparent bar... Few examples are attached as well. Thanks for cooperation \o with love, an alien :afrog:
I'm using VS10, Win10
Target: .NET4 Win7

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Those windows appear to be using Aero and Aero Glass effects, which were introduced with Windows Vista but are no longer supported in Windows 10. There's no inbuilt support in .NET but you can incorporate such effects into .NET apps using API calls. If you search for those keywords then you should be able to find some information.

Thanks a lot jmcilhinney. The problem was I didn't know the keywords, now I do... ;) What about customized buttons on control bar? What keyword should I look up?

You might start here:

https://www.bing.com/search?q=custom...ANNTA1&PC=U531

For custom UI you need to do some work on getting/creating icons, choose color schema for the app, find some custom controls libraries or create them yourself. Then you have to play with controls properties to set colors, fonts, create panels for different parts of the UI.

You also need to add some code to handle mouse movements and clicks to get some of the visual appearance found in other applications.

There are videos which show the process using Visual Studio:

https://www.youtube.com/watch?v=tgqKd7l7_s8

https://www.youtube.com/watch?v=nLfzH4xOVqo

https://www.youtube.com/watch?v=JP5rgXO_5Sk

With regard to icons, you might like to design your own, or just convert an image or an existing icon to the icon you want.
For this purpose I have been using the free 'Junior Icon Editor' from here, for half a tidy few years.

Poppa