Differenct tactic for blocking round border

[Eta76]

I have read a lot about the implementations, and patches to remove the round window corners in Windows 11.

I also noted that when I dock a window to the left top quarter of my screen, I dont get round corner, but nice sharp corners.
When resizing the window, vertical or horizontal. I am even able to Alt+space (system menu) and the "move window", to move the window with the sharp corners to the center of my screen.

So... would this be a new interesting way, to keep the sharp corners?
When we would create a system wide hook, we could let all applications respond to the DWM it wants to have sharp corners.

Any one? Could it work?

[Eta76]

I tried Spy++, but didn't see any changing properties, while the window had sharp corners.