Some dll documentation for the NI-DAQ drivers (NI-DAQ 6.9) can be found in hereSource code for several example applications is included in this manual. I wasn't able to find any information though for Visual Studio.NET.
Do you have any Register-Level Programming information? In here you will find the Register-Level Programmer Manual for the NI 6602, which describes the programmable features of this board and gives the necessary information for programmers who use platforms not supported by NI-DAQ.
In addition I found this link http://digital.ni.com/manuals.nsf/websearch/1630a0b68738b269862567c1007a2912 to which there is explaination of parameters . But its a lot of information and is abit difficult to get a proper program running without more example programs for Visual Studio. Know of any such examples ?
I thought you wanted information about the DAQ dlls, not on the functions used to call these dlls. For more up to date information on these functions, go to Start»Programs»National Instruments»NI-DAQ»NI-DAQmx Help. Depending on what type of example you are looking for (analog input, analog output, digital I/O, counters) and in what program you want to work on (C#.NET or VB.NET), I should be able to help you out.