Refer this post
It says it is not available. But there is a document on Introduction to WebDynpro for ABAP. See if that helps.
See if that is helpful. Just some coding snippets that should give you some idea.
See this link for creating webdynpro applications:
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/web dynpro tutorial and sample applications.faq
See this link for integrating webdynpro applications in portal:
Hope this helps.