Some mask types allow you to display a tooltip (mask hint) that informs users about allowed input values. The MaskSettings.ShowHints property specifies mask hint availability. To access this property, use the editor’s ASPxTextBox.MaskSettings property. Mask hints can help users enter an editor value, especially when they use the UP ARROW and DOWN ARROW keys, or the mouse wheel, to enter values. See the following help topic for details: Keyboard Support in Mask Parts.
The following mask types support mask hints: