Question: Could someone please tell any resources or links to learn usage of Mercurial with Visual FoxPro 9.0?

Answer: 
Ganapathy,

The white paper from my *VFP Version Control with Mercurial* session at Southwest Fox 2011 is now available for download as a PDF from the developers page of my website at <http://www.ita-software.com/foxpage.aspx>. The direct link to the paper is <http://bit.ly/IgXzhM>. This is introductory material intended as a jump start for VFP developers who have never used Mercurial, or perhaps not even any distributed version control system (DVCS). I hope you find it useful.

-Rick
Rick Borup (http://www.ita-software.com/foxpage.aspx) presented a pre-conference session on this topic at Southwest Fox 2011. He wrote a terrific 59-page paper for it. 

I don't know whether he has published that paper elsewhere.

Tamar