BP F4 value help class---to be used in web UI enhancement

Hi

I am a fresher to CRM SAP...

Which is the f4value help class for BP details (Name and ID)?

Where do i implement the value help class method?

I need to display values from my own internal table...ie,list contains values from an internal table populated by select statements...

Should i be writing my code inside the f4 value help class method that i am implementing , to be made available to user as value help pop up?

Any helpful pointers would be rewarded ...

Thanks...