property Column.AutoSearch as AutoSearchEnum
Specifies the kind of searching while user types characters within the columns.

TypeDescription
AutoSearchEnum An AutoSearchEnum expression that defines the type of incremental searching.

By default, the AutoSearch property is exStartWith. The AutoSearch property has effect only if the AutoSearch property of the control is True. Use the AutoSearch property to define a 'contains' incremental search. 

The searching column is defined by the SearchColumnIndex property.