Issue with changing the border of Windows Explorer

[Baldor]

Hello,
I've recently started with customizing my own Windows Theme and already encountered an issue i cant solve. I just cant get rid of the round Aero corners, they are always shining through. Already searched tons of Forums, changed every "Top" image i have found in Windows Style Builder, read Guides to solve it by my own but it just will not work.



My goal is to get sharp transparent corners like they are on the second picture.



I really hope you can help me with this because it's driving me crazy.
If you need any other details to help me i'll give you them.

PS.: Am sorry for my bad english, it isnt my native tongue.

 

[Baldor]

Over 200 views and no feedback?

 

[Berton]

Could be there's no feedback because no one else has tried it. Maybe some of the pages Google Search found will help?
https://www.google.com/search?site=...rue.2..0...1.1.58.hp..6.28.3375.0.te59SQupOKQ