This property indicates whether the object allows multiple selections. The available options for this property are 0 - fmMultiSelectSingle: Only one item can be selected (default), 1 - fmMultiSelectMulti: Allows selecting one item by pressing the space bar or with a mouse click, thus selecting or deselecting an item on the list, or 2 - fmMultiSelectExtended: Allows selecting one item by pressing the SHIFT key, with a mouse click, or by pressing the SHIFT key and one of the arrow keys, extending the selection to the current item. Pressing the CTRL key and clicking the mouse, selects or deselects an item.