The C1HtmlHost control is displayed within a frame by default. By default, borders are displayed around the C1HtmlHost control. For example, in the following image a frame appears in the top and left borders of the C1HtmlHost control:
You may want to hide this frame border – for example, if you want the control to blend more seamlessly with your application. When the FrameBorder property is set to False, a frame will not appear around the C1HtmlHost control. For example, in the image below the frame is not visible:
You'll notice that when the frame is not visible, the C1HtmlHost control blends into the background of the application more. For an example, see Hiding Frame Borders.