These Help pages can be downloaded here with the Winning Bridge Shareware game for Microsoft Windows 98, ME, 2000 and XP.
If you would rather read a book, take a look at the Help Index page for some suggestions.
Second Bid - Opening Bid of 2C
Partner bid 2 diamond:
23-24 points and a balanced hand: bid 2 no trump
bid a 5+ card suit
With all suits controlled (ace, king or 4 or more cards with no voids or singletons): bid 3 no trump.
Any other response:
show support with 3+ cards
bid a 5+ card suit
With all suits controlled (ace, king or 4 or more cards with no voids or singletons): bid 3 no trump
Keep bidding when it is your turn until at least game has been reach or you are in a slam.