[Create Annotation Context Menu in WinForm]

I'm having trouble to create a context menu on an annotation in Win Form. I created an annotation as below :

Dim text As New Annotation.AnnotationText

text.Text = "Test Annotation"

text.SizeToFit()

text.Color = Color.Yellow

text.PlotAreaOnly = False

text.AllowMove = True

text.Rotate(False)

text.AllowModify = False

annAnnotations.List.Add(text)

Please tell me how to show the context menu by right-clicking the annotation?