There may be times in your application where the user selects an option that will cause CreateAnnotation to be called, passing in the annotation to be created. The user then changes their mind and selects another option. In this case you need to stop the AnnotateViewer control from creating the annotation. This can be done by passing in null or Nothing to the CreateAnnotation method.

[C#]

this.Viewer.Annotations.CreateAnnotation(null);

[Visual Basic]

Me.Viewer.Annotations.CreateAnnotation(Nothing)

NOTE: This article is specifically about our WinForms control: AnnotateViewer. For cancelation of interactive annotation creation in an ASP.NET web app using our WebAnnotationViewer control, please see KB HOWTO: Cancel Creation of Annotations in WebAnnotationViewer control (Legacy Web Controls).

Original Article:
Q10112 - HOWTO: How can I cancel a call to CreateAnnotation in WinForms apps using AnnotateViewer?