The Visual LANSA Application Object has a wide range of features, some of these are valid for web development.
If you select a feature not supported for Web you will receive an appropriate message in your source code:
A few of the most useful features available for Web development include:
SYS_APPLN.CreateBitmap - 12.1 Create an Instance of a Bitmap
SYS_APPLN.TraceMessageText - 12.2 Add Tracing Text
SYS_APPLN.Idle and SYS_APPLN.IdleEnd - 12.3 Check for Inactivity in Session