Hi,
This device uses the DAQmx Base driver. This is different then just the DAQmx driver. The DAQmx Base driver supports many products on different OSs. It also suppports many of our newer USB products. So, you do not have access to the DAQ assistant, since that is specific to DAQmx. Eventually, this device will be ported over to DAQmx, but I have no idea when that will happen.
For your other question, you should use one of the examples in the DAQmx Base folder. There are examples for AI, which is what you are looking for.
Have a Great Day!
George