Gets or sets whether incremental searching for items is enabled.
true if incremental searching for items is enabled; otherwise, false.
The incremental search feature allows an end-user to quickly locate items by typing the initial characters of the item's text. The search is performed in the forward direction. Once an item that matches the search criteria has been found, an end-user can continue searching for the next item matching the same criteria. To continue searching in the forward or backward direction, press the CTRL+DOWN ARROW and CTRL+UP ARROW keys, respectively.