// Setup rectangle for the hollow ellipse mark's location.
ImGearRectangle igRectangle = new ImGearRectangle(10, 10, 300, 100);
// Setup color for the hollow ellipse.
ImGearRGBQuad igRGBQuad = new ImGearRGBQuad(40, 200, 40);
// Create hollow ellipse with a border of 10 and highlight off.
ImGearARTHollowEllipse igARTHollowEllipse = new ImGearARTHollowEllipse(
    igRectangle, igRGBQuad, 10, false
);
// Add the annotation to the ARTPage.
igARTPage.AddMark(igARTHollowEllipse, ImGearARTCoordinatesType.IMAGE_COORD);

' Setup rectangle for the hollow ellipse mark's location.
Dim igRectangle As New ImGearRectangle(10, 10, 300, 100)
' Setup color for the hollow ellipse.
Dim igRGBQuad As New ImGearRGBQuad(40, 200, 40)
' Create hollow ellipse with a border of 10 and highlight off.
Dim igARTHollowEllipse As New ImGearARTHollowEllipse( _
 igRectangle, igRGBQuad, 10, False)
' Add the annotation to the ARTPage.
igARTPage.AddMark(igARTHollowEllipse, ImGearARTCoordinatesType.IMAGE_COORD)