which flow is to follow to get successfully enumeration.I saw demos but it not getting exact flow of enumeration of usb.

 

The USB spec housed at USB.org is an excellent document that covers any queries you might have. Speaking to us in technical terms would help

 

which flow is to follow to get successfully enumeration.I saw demos but it not getting exact flow of enumeration of usb.

Depending on OS.

You can simply put log in your device USB stack, and at the end of enumeration will have log file with complete flow.

 

There is a complete starter project at www.waitingforfriday.com
He supplies circuit, pic code and pc code.
I have used that as the basis for a few projects and it works well.

 

There is a complete starter project at www.waitingforfriday.com
He supplies circuit, pic code and pc code.
I have used that as the basis for a few projects and it works well.

Which article are you referring to? You link take me to the home page, where I can find lots of USB articles. Please specify.

EDIT: I'm guessing its this one: http://www.waitingforfriday.com/index.php/Building_a_PIC18F_USB_device