Gets or sets a value indicating whether the action which raised the event should be canceled.
true if the action that raised the event should be canceled; otherwise, false.
The ASPxClientTrackBarPositionChangingEventArgs object is passed to the client events that fire before specific actions. The cancel property of this object enables you to cancel the action which is about to be performed. Set this property to true to cancel the action that raised the event. This can be used if you want to prohibit performing the corresponding action with respect to specific conditions.