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A WAM may contain one or more Webroutines. These contain your Application Logic. They can be thought of in much the same way as subroutines. Indeed, a Webroutine is defined in a similar manner to a subroutine, using the Webroutine/Endroutine command combination, as follows:
To execute this Webroutine from a browser (i.e., to initiate this Webroutine), a user would enter a URL that looks something like this:
http://www.MyWebSite.com/cgi-bin/lansaweb?wam=MYWAM&webrtn=MyWebroutine
Note that, when the Endroutine statement is reached, control is passed back to the Presentation Layer.
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Of course, you will often want to pass data back and forth between the Application Logic Layer and the Presentation Layer. This is done with 1.4.2 Web Maps.