Windows 10 explorer resize to the title bar

[quantic]

Hi,

 

The  File Explorer in Windows 10 doesn't allow resizing with the mouse gripper to the titlebar, like notepad for instance.

It leaves some reserved space with the contents of the client area and toolbar visible.

I'd like to know how can I resize the window to the titlebar by script. What I'm trying to do, is executing a "rollup" like: Actual Window Rollup.

Does anyone have an idea how this was implemented?