You would access the driver from Measurement Computing - the maker of the board. Not National Instruments so I don't know why you posted here. If you have a question specific to whatever programming language you are using, then use a more appropriate forum/board.
I want to know that what are the parameters i have to consider to making such type of VI .i am sending you my vi which i made in labview 7.1 . it is working but i cant able to store the sampled data and how can i see the sampled waveform. please help.