How to chane camera attributes

Hello all, I need to modify i real time some camera attributes ( Exposure time, Gain, etc.) but with the function  IMAQdxSetAttribute  is it not possible, and cause an error, (attributes like zoom, focus, I don`t have any problem).
It is possible to change this attributes with other function ???
thanks for all.

http://digital.ni.com/public.nsf/allkb/E50864BB41B54D1E8625730100535E88

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