about smartcard reader and tag is rfid card

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C#

hi,
i am developing a project which depends on rfid card reader.
by using WINSCARD.Dll i can get the readers information which i have , now i want to connect smart card and get information from that card ,can u suggest how to use

SCARDCONNECT()
SCARDSTATUS()
SCARDTRANSMITT()
etc functins in c# how to pass arguments
and return types in our meaning ful format ,not like in MSDN site format i have seen that site also but i cant understand how to convert.........

THANKS®ards
venkat