User manual

Chapter 2 Fundamentals of Building Windows Applications

NI-DAQ Examples

The NI-DAQ installer installs a suite of concisely written examples in the

following application development environments:

• LabWindows/CVI 5.0.x

• Microsoft Visual C++ 2.x (32-bit) or later

• Microsoft Visual Basic 4.0 (32-bit) or later

• Borland C++ 5.0

These examples illustrate how to use NI-DAQ functions to perform a single

task. All examples are devoid of any code to extract values from GUI

objects so that you can focus on how the code flow is formed. In addition,

most parameters are hardcoded at the top of the routine so that if you decide

to change them, you can simply change the assignment.

The examples correspond to the function flowcharts that you will see in

Chapter 3, Software Overview. If a task and a flowchart in the following

chapter suits your data acquisition needs, you should find a corresponding

example to get you started.

Each example consists of the following files:

• An appropriate project file for the programming language (except for

Borland C++, where

.bat

files are included to help build the

executable)

• A single source code file to illustrate the task at hand

• A library of NI-DAQ example utility functions (for buffer creation,

waveform plotting, error checking, and implementing a delay)

Note

None of the examples are installed in their executable (

.exe

) format. To run them,

you first must build them or load them into the IDE for the appropriate programming

language.

The examples are stored in the hierarchy shown below for each language:

.\AI

Analog Input examples

.\AO

Analog Output examples

.\DI

Digital Input examples

.\DO

Digital Output examples

.\CTR

Counter/timer examples

.\SCXI

SCXI examples

.\CALIB

Calibration examples