// Setup rectangle for the text mark's location.
ImGearRectangle igRectangle = new ImGearRectangle(10, 10, 100, 40);
// Setup color for the text.
ImGearRGBQuad igRGBQuadText = new ImGearRGBQuad(40, 40, 200);
// Setup color for the fill.
ImGearRGBQuad igRGBQuadFill = new ImGearRGBQuad(200, 200, 200);
// Create the button annotation.
ImGearARTButton igARTButton = new ImGearARTButton(
    igRectangle, "ImGearARTButton annotation", igRGBQuadText,
    igRGBQuadFill, 255, "Arial", (float)14.0, ImGearARTFontStyles.Regular
);
// Add the annotation to the ARTPage.
igARTPage.AddMark(igARTButton, ImGearARTCoordinatesType.IMAGE_COORD);

' Setup rectangle for the text mark's location.
Dim igRectangle As New ImGearRectangle(10, 10, 100, 40)
' Setup color for the text.
Dim igRGBQuadText As New ImGearRGBQuad(40, 40, 200)
' Setup color for the fill.
Dim igRGBQuadFill As New ImGearRGBQuad(200, 200, 200)
' Create the button annotation.
Dim igARTButton As New ImGearARTButton( _
 igRectangle, "ImGearARTButton annotation", igRGBQuadText, _
 igRGBQuadFill, 255, "Arial", CSng(14), ImGearARTFontStyles.Regular)
' Add the annotation to the ARTPage.
igARTPage.AddMark(igARTButton, ImGearARTCoordinatesType.IMAGE_COORD)