Add header menu in Gridpanel

Hi,

I'm using

Code:

---

<ext:GridPanel

---

and i trying to add menu in header of column. And my gridpanel is feed with binding.

I wonder if it is possible to add a menu as "fate accending" but named "backup" and using a function written in the file. Cs, I work in C # in .asp.net

Here's an example, here we see a new menu "Columns" , I'd do the same, if possible using the code in C # or i accept Js but i don't need code feed my girdpanel, just for adding a new menu.

Attachment 4592

I hope this post is well written and clear enough

Thank you in advance