Reordering

Every column can be moved by mouse click and drag. To enable that, enable the Dragable column property (enabled by default). After the column has been moved, the Index (an index in the columns collection) and VisibleIndex (an index in the visible columns collection) column properties will be changed.
Also, you can change the column order programmatically by changing the Index column property.

Events

The ColumnIndexChanging and ColumnIndexChanged treeview events will be raised before and after column reorder respectively.

Control the column order

To deny movement of a column to a particular position, subscribe to the ColumnIndexChanging treeview event and enable the pArgs.Cancel event parameter for these positions by analyzing the pArgs.NewIndex event parameter.