Need some ideas on persisting combobox. Please Look

I extended the windows combobox class to add some customer functionality. I use this combobox on about 20 screens. Somehow, I would like to persist the user's list of items when the form unloads and reload the list when the form is loaded. Anyone have any good ideas on implementing this. Is there any events I can use within the combox when it initializes or destroys?

Thanks

save and reload from a text file, xml file, database, etc.

Wish it was that easy..;)

Each combobox is unique, and can have different values. What would you use for the unique id? Their might be 20 of these controls on different forms with different values. I need my combobox to be self contained. Serialization maybe?