how can we use card object to make game like solitaire. where are cards displayed
There's an example of this in the uploads forum, here:
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actually i thought that card object has cards as in cards.dll
does it mean we have to design our own cards
Yes, for now.
May I suggest you look here: http://www.jfitz.com/cards/ if you don't want to design your own cards. They provide a couple decks to choose from.