Hi, 
    I need write Instrument driver for our Test Equipment  product family consisting of multiple cards. If I write the driver in a usual  NI conventional method, i.e. one driver for per card, then there will be lot of  duplicate codes between them and pain to maintain.  Base code is exactly identical among them (50  % code). So, need your expertise to identify the best approach to write the  driver.  Any help is appreciated. 
    NI conventional method: 
    http://zone.ni.com/devzone/cda/tut/p/id/3271 
    Thank you, 
    Balendran