AutoCAD .NET :: Change Hatch Size (not Pattern Scale Or Space)

I need to change the hatch size (not the pattern scale or space, juste the hatch size).

Exemple : I have a circle, and a hatch inside the circle. The radius of the circle is 10, so the radius of the hatch is 10 too.

What i want to do is to make the hatch smaller (or bigger) like this : Circle radius : 10, Hatch Radius 5 (or 15).

My first idea was to recreate a new circle with radius 5, and a new hatch inside and then erase the second circle. It works, but not very effective in my case.

So, it's why i came here to ask if there is any solutions to make this faster, easier, without having to recrate another hatch, another circle...