// Setup color for the rich text border.
ImGearRGBQuad igRGBQuadBorder = new ImGearRGBQuad(0, 255, 255);
// Setup a border with a width of 3 and a solid pattern.
ImGearARTBorder igARTBorder = new ImGearARTBorder(
    igRGBQuadBorder, 3, ImGearARTPenStyle.SOLID
);
// Setup rectangle for the rich text mark's location.
ImGearRectangle igRectangle = new ImGearRectangle(10, 10, 300, 40);
// Setup fill color for the rich text mark.
ImGearRGBQuad igRGBQuad = new ImGearRGBQuad(210, 210, 210);
// Set initial rich text string
string richText = "{\\rtf1\\ansi\\ansicpg1252\\deff0\\deflang1033{\\fonttbl{\\f0\\fnil\\fcharset0 Arial;}}\r\n";
richText += "\\viewkind4\\uc1\\pard\\fs23 ImGearARTRichText test\\par\r\n}\r\n";
// Create rich text mark with 70% opacity
ImGearARTRichText igARTRichText = new ImGearARTRichText(
    igRectangle, richText, igRGBQuad, igARTBorder, (int)(0.70 * 255)
);
// Add the annotation to the ARTPage.
igARTPage.AddMark(igARTRichText, ImGearARTCoordinatesType.IMAGE_COORD);

' Setup color for the rich text border.
Dim igRGBQuadBorder As New ImGearRGBQuad(0, 255, 255)
' Setup a border with a width of 3 and a solid pattern.
Dim igARTBorder As New ImGearARTBorder(igRGBQuadBorder, 3, ImGearARTPenStyle.SOLID)
' Setup rectangle for the rich text mark's location.
Dim igRectangle As New ImGearRectangle(10, 10, 300, 40)
' Setup fill color for the rich text mark.
Dim igRGBQuad As New ImGearRGBQuad(210, 210, 210)
' Set initial rich text string
Dim richText As String = "{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fnil\fcharset0 Arial;}}"
richText += Chr(13) & "" & Chr(10) & "\viewkind4\uc1\pard\fs23 ImGearARTRichText test\par"
richText += Chr(13) & "" & Chr(10) & "}" & Chr(13) & "" & Chr(10) & ""
' Create rich text mark with 70% opacity
Dim igARTRichText As New ImGearARTRichText( _
 igRectangle, richText, igRGBQuad, igARTBorder, CInt(0.7 * 255))
' Add the annotation to the ARTPage.
igARTPage.AddMark(igARTRichText, ImGearARTCoordinatesType.IMAGE_COORD)