Hi kovalenkov,
Actually, if you have already simulated the device, the "hard part" is done. DAQmx should have given the simulated device a name (such as "DevX"), and you can just call that name in your code as you would call a real device. The inputs to the device are already simulated for you. So, for example, if you were to call an analog read function, it simulates a sine wave input based on any timing information you give it.
Thanks,
Justin M.
National Instruments
ps - I agree this should be in the Digital I/O section. If you would like to reply, just start a new thread in Digital I/O, and post a link to that thread here.