Log Value Changes of All Front Panel Controls to a File or Database using LabVIEW

[JamesC]

Description

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1. Overview
This VI logs all value changes in its front panel controls to a file.

2. Description
Use this example to learn a way to log all changes to front panel values and log these to disk. This is accomplished using the VI Server, dynamic event registration, variants and property nodes. Use the case structure to define how to interpret the variant value of each control, so that the formatting is correct in your log file.
Dynamic event registration allows you to use VI Server references, such as Application, VI, or Control, to specify at run time the objects for which you want LabVIEW to generate events.

3. Requirements

NI LabVIEW Base Development System 2012 or compatible.

4. Steps to Implement or Execute Code

1. Download and Run the VI.
2. Change the values of the controls multiple times.
3. Click the Stop button to stop the VI.
4. Look for the log file in the VI's directory.
5. Change controls in the front panel and add the control class for each different one in the case structure, so that LabVIEW can interpret them according to your needs.

5. Additional Information or References

• Dynamically Registering for Events
• Control Class Properties
• Variant data type

**The code for this example has been edited to meet the new Community Example Style Guidelines.**

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[NI-hilator]

Thanks for the great example!  It doesn't seem to catch events for controls inside the tab control.  Any thoughts?