Exchanging 2 D array between VBA and labview

I have a project : half part is VBA writen, half part is Labview coded. Both parts are writen to operate manually. The first one prepares data and charts them on charts sheets, the second one smooths data with ready made labview curves fitting VIs. So I want operator could use them seamless, that means calling labview from VBA 2007 code collecting X,Y data into a 2 D array, then send it to labview DLL smooth the curves and send back an array with smoothed data to excel through VBA.
My concern is how to declare 2D array parameters in VBA and in Labview in order to work fine (array of variants or doubles, parameters declared by ref or by val)
I have seen similar topics in NI forum but they dealt with VB.net and not VBA .
I run office 2007 and labview 2009 full dev. system with application builder.
Regards

bassevellois wrote:
Thank you for the answers.
The examples provided with labview for ActiveX exchanges are not very clear. I want to use labview as ActiveX server and Excel through VBA as client.
There's only one example that I know of that ships with LabVIEW and it shows how to access LabVIEW from VB using LabVIEW's ActiveX server. It opens a VI and runs it. Doing it from VBA is very similar. You want to add the reference to the ActiveX Server in your VBA project. If you're controlling the LabVIEW development environment directly, then the library to include in your list of references will be "LabVIEW x.x Type Library". If you are controlling a LabVIEW-build app, then the library name will be whatever you specified when you built the app.
I have no idea of creating and exposing classes, methods or properties needed in VBA from my Labview VI which was at the beginning a standalone application.
I don't quite understand what you are referring to. The ActiveX Server in LabVIEW and a LabVIEW-built app are pre-defined. You do not export anything from your LabVIEW VI. The available properties and methods are a function of the LabVIEW ActiveX Server, not of your VI. If you are building an app then you just need to enable the ActiveX server for the application, and that's done in the build specification.
How to reproduce my example:
Make sure you've enabled the ActiveX Server in LabVIEW.
Download the attached 2D_VBA_Test VI to your C:\Temp folder. You can save it anywhere, but you'd have to change the path in the Excel VBA macro.
Download the attached Excel workbook.
Open the workbook and click the button. If LabVIEW is not running it should launch LabVIEW, and open the VI and populate the front panel array with the values from the spreadsheet.
Attachments:
2D_VBA_Test.vi ‏6 KB
VBA to Excel.xls ‏24 KB

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Matthew
Ho wrote:
> I have decided a project that consists of C++ and Labview. C++ is used
> as the input to labview. However, i don't know how to use C++ to
> control the labview. Can C++ control the labview directly? and how ?
> or I have to buy another program or hardware to be interface?
>
> Sent via Deja.com http://www.deja.com/
> Share what you know. Learn what you don't.

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