Hello I'm looking for control, which allow select multiple values like MultiCombo, but allow keyboard control and adding new values

I found BoxSelect http://kveeiv.github.com/extjs-boxse...boxselect.html

and http://www.sencha.com/forum/showthre...mbobox-for-4.1

which looks good, but I don't know how to use it with ext.net?

Any suggestion how to use this extensions or another solution for multicombo?

Thanks