As mentioned before, LabVIEW ships with a large number of examples on using DAQ and DAQmx. The examples can be found by going to Help>Find Examples. When the Example finder opens, click the Browse tab. In the Example window, double click the Hardware Input and Output topic. There are both DAQmx and traditional DAq topics under that. Expand further to see the examples. You should also go to Help>Search the LabVIEW Bookshelf. When that opens, click the LabVIEW Measurements Manual and open that that. If, after reading this and looking at the examples, you still have questions, post back but this time include the type of DAQ board you're using, what type of measurment you need to take, and details on what kind of problems you're having.