I’ve seen this control in applications, and not just dreamed it, right?

- There are two list-boxes, left and right.
- Left-box contains a list of possible selections
- Right-box contains the selected items.
- Right-box may contain duplicates.
- Right-left controls between the two boxes allow adding from right-to-left, or deletion from the right.
- up-down controls to the right of the right-box allows for re-ordering of a selected item.
- Standard WinForms. VS2010 and 4.0 runtime, if it makes a difference.
You can get the control here.
This is a new control, inspired by this WPF control and this asp.net project.
Thanks to everybody that pointed out existing projects, and suggested building my own.