Files to look at:

Default.aspx (VB: Default.aspx.vb)
Default.aspx.cs (VB: Default.aspx.vb)

How to move selected rows from the ASPxGridView into another ASPxGridView

This example illustrates how to move selected rows from the ASPxGridView control into another ASPxGridView. Data manipulations are performed on the database's side.

See Also:
How to delete the ASPxGridView's selected rows
GridView - How to copy selected rows from one grid to another one in batch edit mode