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 ASPxClientHtmlEditorTabCancelEventArgs object is passed to the client HtmlEditorClientSideEvents.ActiveTabChanging event that fires before an active tab is changed. 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.