I am a novice to Platform Builder.
I need to know how to work with platform builder.
As I googled I was not able to find where to start from.
Following is what I am looking for.
First you need to download the Evaluation Edition of Windows Embedded CE 6.0 (it includes Studio 2005).
Next download R3.
Books are pretty rare. Sam Phung has the only one that is current.
MSDN has loads of walk throughs.
Be forewarned, it is probably the most complex tool you're ever used (unless you've done embedded OS development before) and it takes a long time to get proficient in it. I'd highly recommend gettting actual in-person training.