Where can I find DDE execute vi

[Dai]

Hi all,

I need to communicate with an third party software (OPUS). The communication available is DDE Based.

I found an  example here :   http://zone.ni.com/devzone/conceptd.nsf/webmain/14134D7CE042EDBF86256A3A006BD87C

With the example, there's a connect vi, close connection, request and poke vi but no execute one.

Where can I find that?

Thanx

Dai

[Dennis_Knutson]

It's in the same place you found the others - \LabVIEW\vi.lib\platform\dde.llb. Don't try to find any DDE functions on the palette. Even though they still ship, NI removed all DDE functions from the palette a long time ago due to Microsoft dropping support for DDE and so few applications supported it.

[Dai]

Oups,

Thank you very much, I did not look in this library. I searched for dde files and did

not looked at this one I suppose.

Unfortunately, OPUS only support DDE. It is possible to access OPUS through

OPUS Process via OPC but the communication is very limited. You cannot

access all the functions...

Thanks

[JayK.]

For anyone still looking to control OPUS with labview, note that an ActiveX interface is available free of charge (via e-mail) if you talk to one of their support folks.

[eruvi]

Could you please send me this ActiveX interface?

Thank you

[Jeremy_B]

Hi eruvi,

I believe the ActiveX interface would be available from Opus software itself, www.opussoftware.com. 
LabVIEW's ActiveX VIs can be found in the Connectivity palette.

[eruvi]

Hi geremy_B

May you have any example code of controlling OPUS via Labview? it's really can help me

Thank you

Tomer

[Jeremy_B]

Hi Tomer,

We do not have any example code unfortunately (that I am aware of).

Here's a link to an intro on using ActiveX with LabVIEW, hopefully it might help you out: http://zone.ni.com/devzone/cda/tut/p/id/2983

[JayK.]

Once you are comfortable with Labview and ActiveX (and have downloaded the OpusCMD package), the code should be pretty striaght forward

 TakeBackground a = new OpusCMD334.TakeBackground();
 QuickSample q = new QuickSample();
 bool error = a.TakeReference(XPMFile); //XPMFile is the filename for a scan method you've created
 bool error = q.QuickSample(XPMFile);

Your data is now in q.DataArray, which is a 2D array of double.

That's in C#, but it should point you in the right direction for what to call in Labview.

Don't forget to read the documentation that comes with the package. It's a bit wordy, but all the info you need is there.

-Jay


Message Edited by JayK. on 08-06-2008 11:32 AM

[eruvi]

Thank you very much