Hi wanger-
DataSocket is a technology pervasive throughout the National Instruments' product line. If you want to access DataSocket in a dll module, I would recommend creating the dll with LabWindows/CVI. CVI ships with both the server and client sides of DataSocket, this would be an excellent starting point. Even before making the dll, I would recommend testing the DataSocket connection in regular exe form. Always a good step when dealing with dlls.
To create a dll in CVI, change the taget settings in the project window to "dll".
Good luck
ben schulte
national instruments