© National Instruments Corporation 3 NI 6509 User Guide and Specifications
Programming Devices in SoftwareNational Instruments measurement devices are packaged with NI-DAQ 
driver software, an extensive library of functions and VIs you can call from 
your application software, such as LabVIEW or LabWindows™/CVI™, to 
program all the features of your NI measurement devices. Driver software 
has an application programming interface (API), which is a library of VIs, 
functions, classes, attributes, and properties for creating applications for 
your device.
NI-DAQ 8.x includes two NI-DAQ drivers, Traditional NI-DAQ (Legacy) 
and NI-DAQmx. Each driver has its own API, hardware configuration, and 
software configuration. Refer to the DAQ Getting Started Guide for more 
information about the two drivers.
Traditional NI-DAQ (Legacy) and NI-DAQmx each include a collection of 
programming examples to help you get started developing an application. 
You can modify example code and save it in an application. You can use 
examples to develop a new application or add example code to an existing 
application.
To locate LabVIEW and LabWindows/CVI examples, open the National 
Instruments Example Finder:
• In LabVIEW, select Help»Find Examples.
• In LabWindows/CVI, select Help»NI Example Finder.
Measurement Studio, Visual Basic, and ANSI C examples are in the 
following directories:
• NI-DAQmx examples for Measurement Studio-supported languages 
are in the following directories:
–MeasurementStudio\VCNET\Examples\NIDaq
–MeasurementStudio\DotNET\Examples\NIDaq
• Traditional NI-DAQ (Legacy) examples for Visual Basic are in the 
following two directories:
–NI-DAQ\Examples\Visual Basic with Measurement 
Studio directory contains a link to the ActiveX control examples 
for use with Measurement Studio
–NI-DAQ\Examples\VBasic directory contains the examples not 
associated with Measurement Studio
• NI-DAQmx examples for ANSI C are in the NI-DAQ\Examples\
DAQmx ANSI C Dev directory
• Traditional NI-DAQ (Legacy) examples for ANSI C are in the 
NI-DAQ\Examples\VisualC directory
For additional examples, refer to zone.ni.com.