How would I be able to create a list field in VS that would be a lookup to select columns from any list?
I would preferably like to have something like the PickerTreeView.aspx, but instead of selecting lists select the lists' columns. Note that I don't want the column's value, I want the actual column.
Would this have to be done with a custom column and by editing my list's forms? (Edit/New)
I'm assuming something like this: http://blog.sandippatil.com/list-item-tree-view-in-sharepoint/ would be helpful to create the tree view.
Any help is much appreciated.