>I have limited display area with only 5 columns showing, with the ability to change display order by clicking on the column headers, which is used by the IncrementalSearch text control. When the split bar is used and a column off the right of the grid is chosen to search on, it disappears as soon as the user types in the "Search" text box. Is there a way to keep (lock) the search column visible.

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You could reset it programmatically using the Partition property of the Grid. Store it to a variable first, do your search and reset it back.

HTH!