You'll find all the Context Sensitive Help "APIs" that can be used by application developers here:
C:\Program Files (x86)\Adobe\Adobe RoboHelp 10\CSH API (or whereever it may be installed on your OS)
Here are all the supported languages
Documentation which your developers will want can be found here in the online help:
Context Sensitive Help
Author and developer roles in creating context-sensitive Help
Information for developers
Create Help for iOS and Android apps
Link to Peter Grainge's Website for "Calling Webhelp"
Hope this helps
Adobe Certified RoboHelp and Captivate Instructor
Good catch, Willam. Thanks for reminding me!