Event on hideColumn

Hi there,

i have set "allowHide: true ," set in gridOptions.
Now I would like to store the hidden columns per user.
So if a user hides/unhides a column i would like to store this information in a database.
If the user opens that page later again - the columns are displayed like he left them on the last visit.
(So maybe also the size and order of the columns)

Question now ist, is there an event when the user hides/unhides a clolumn and how can I get this information.
(So maybe also the size and order of the columns)

Thanks for Help