Requesting Microsoft Windows API Documentation via own program

Requesting Microsoft Windows API Documentation via own program

I'm analyzing the Portable Executable format within my application,
partially. One goal is to display official documentation information about
used Windows API functions.
Microsoft provides all its Windows API Documentation online. I'd like to
obtain function documentation such as:
http://msdn.microsoft.com/en-us/library/windows/desktop/bb773748%28v=vs.85%29.aspx
Is there a comfortable way to get this information in a structured format
(e.g. JSON) via Webrequest? It wouldn't be nice trying to request their
HTML document. And furthermore, how could I find the corresponding URL to
my needed Windows API function Documentation?
Thanks for your advices/help.
Cheers
PAX