Hello,
Dave has posted a couple of example programs which use DDE in LabVIEW.
You can find a tutorial by going to
http://www.ni.com
and clicking on "Support." Under Option 3, search "Tutorials/Application Notes" and enter "DDE LabVIEW" (without quotes) into the keywords box. One of the first links that will appear is "Using DDE in LabVIEW (Windows Only)." It is a tutorial which introduces DDE and LabVIEW. You can link directly to it
here.
LabVIEW also ships with a couple of DDE examples. In LabVIEW 7.0, you can find these by going to Help, Find Examples. In the Browse tab, select Task and navigate to "Communicating with External Applications" and
then to "Dynamic Data Exchange (DDE)." If you are using a different version of LabVIEW and unable to locate these examples, please let me know.
The DDE functions are no longer in the palettes as of LabVIEW 6.0. You can still find them in
Program Files\National Instruments\LabVIEW 7.0\vi.lib\platform\dde.llb.
However, we recommend that you use ActiveX instead of DDE. There are quite a few examples for using ActiveX in the Example Finder under "Communicating with External Applications" and then "ActiveX." You can also find an introduction to ActiveX by searching the Tutorials and Application Notes like above. Searching for "ActiveX LabVIEW" (without quotes) will return a link to a tutorial named "ActiveX and LabVIEW." A direct link to this document is
here.
If you need to use DDE, see if these resources will provide the background you require. If you are flexible, t
ry using ActiveX as it is simpler. Feel free to post again if you have additional questions.
Happy coding,
Grant M.
National Instruments
