>How do I use mmCheckedListBox? Specifically how to write the DataObject bound to the mmCheckedListBox?

You can set the BindingSource, BindingSourceDisplayMember, and BindingSourceValueMember properties as you normally would in a combo box or list box. If you allow more than one box to be checked you can examine the control's ObjectCollection, CheckedItemCollection, and CheckedIndexCollection properties. For more details, see the .NET Help topic "CheckedListBox Class".

Regards,