BAPI: How to Insert the code

Hello,

I am trying to create a bapi, using the following example. http://www.sapgenie.com/abap/bapi/example.htm#step2

In the step2, source code attribute, I dont understand, how to write the " Include LZBAPIStatusu02.........".

can somebody please suggest me the steps to create that code. Thanks in advance.

regards,

Raj.