API Manual

TActiveImage is the active control counter part to TImage. TActiveImage displays an image on a page. The image is specified via the ImageUrl property which takes a relative or absolute URL to the image file. The alignment of the image displayed is set by the ImageAlign property. To set alternate text or long description of the image, use AlternateText or DescriptionUrl, respectively.

TActiveImage allows the AlternateText, ImageAlign, ImageUrl and DescriptionUrl to be updated during a callback request.