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Archived:Dynamic Data Exchange (DDE) Functions Palette in LabVIEW

Updated Dec 22, 2022

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This content provides support for older products and technology, so you may notice outdated links or obsolete information about operating systems or other relevant products.

Reported In


  • LabVIEW Full
  • LabVIEW Professional

Issue Details

I want to use DDE in a newer version of LabVIEW, or a piece of software that has been give to me requires use of the DDE library, but I cannot find the DDE functions. In LabVIEW 5.1, the functions were located on the Functions»Communication»DDE palette. Where are these functions located in newer versions of LabVIEW?


The DDE functions are still present in newer versions of LabVIEW, although National Instruments recommends that you use ActiveX. If you want to use DDE, the functions are located in a library that can be found at the following location in your LabVIEW directory:


In order to add this Library to your LabVIEW functions palette you can copy the dde.llb file into:


This will make all the functions appear in the addons section of the functions palette.
Refer to the Using DDE in LabVIEW for Windows Application Note (linked below) for more information about using DDE.