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I am working on a C# chat client that needs to have a sending icon when a message is being sent. The icon cannot be an image because of the nature of my program. All messages are displayed in a web browser control that is constantly being modified. Is there any way to draw a circle that could change color or size slightly without relying on html5/canvas, or something like flash/java. I cannot guarantee that any of those frameworks will exist on the client computers.
Unicode contains a circle (●), so it will behave like a text element. You can size it and color it accordingly. This will also work with older browsers.
http://www.fileformat.info/info/unicode/char/25cf/index.htm