I use CWIMAQViewer on a WindowsForm (VB.NET) to display images from a CCD camera. I then draw a circle using the toolbar to enclose certain features in the image. I noticed that when I click on the circle and hold the mouse down, the Viewer displays the parameters of the circle (see figure below). How can I access these parameters in my code? What is the circle drawn with the toolbar? A region? An overlay? Thanks.