LabView to ActiveX Variant

Hello,
I was looking for some help with this. I have had issues in the past with placing arrays into an ActiveX Variant and found that ActiveX variants are not the same as LabView variants. I am tring to place a 0 or a 2 into Property input which is variant type. At this moment, it does not work. My guess is that the activex variant isn't handling the input well. I may be wrong, but my intuition say this is my issue. Does anyone have a way to deal with this? Here is NI's response to the issue.
Thank You for your responses.
-=-=-=-=
Hi Chuck,
I was able to talk to R&D and it looks like there is not necessarily a
simple or new way to handle ActiveX Variant data in LabVIEW. From a previous
issue I found, the engineer had worked with R&D and said:
"Use the 'Database Variant to Data' VI instead of the 'Variant to Data' VI
While the name may be misleading, the Database Variant datatype is the same
datatype as the ActiveX Variant. The native LabVIEW Variant is different from
the ActiveX and Database Variant datatypes."
The customer in that case had a few issues using this VI, though, so it may
also not help your implementation either; there also is not a "Data to
Database Variant" function that I am aware of. Furthermore, I understand
that this VI is the same direction of dataflow as RolfK's example. As far as
the "Data to ActiveX Variant" implementation, R&D said that it
would have to be implemented the same way that Rolf has made his VIs. The
R&D engineers referenced the following example, which is also linked by
"lvb" in the LAVA forum post:
NI Community: Dereferencing Pointers from C/C++ DLLs in LabVIEW
https://decibel.ni.com/content/docs/DOC-9091
Finally, I did find a post in the LabVIEW idea exchange, which I believe was
started by "lvb" on the LAVA forum you found. If you are not familiar
with the Idea Exchange, it is where LabVIEW users can propose and
"Kudos" (or vote) for ideas that they wish would be implemented in
LabVIEW. While this does not guarantee that a feature will be in a future
version of LabVIEW, it does more effectively put it on NI R&D's radar.
LabVIEW Idea Exchange: Support OLE Variant or ActiveX Variant Type Access
http://forums.ni.com/t5/LabVIEW-Idea-Exchange/Support-OLE-Variant-or-ActiveX-Variant-Type-Access/idi...
Attachments:
GM FLIR A320 ImageGrab AE.jpg ‏16 KB

appears it is okay to wire directly like that. I found examples with I16 wired straight to property input. Must be the resister I am writing to isn't work like it should.

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ActiveX variant to LabVIEW variant

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FALSE

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Mike,
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Hi Woody247,
Here is brief overview to help using LabVIEW with ActiveX:
http://www.ni.com/white-paper/2983/en/
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I've realized that you can cast ActiveX object references to another child class in the following way:
This was the correct solution and I want to share it with you.

How does labVIEW use ActiveX controls?

How does labVIEW use activeX controls?
I recently wrote an activeX control in VB and noticed that it would not work if the control was set so that its properties could not be set in ambient mode. This may suggest that labVIEW uses some activeX controls only in ambient mode.
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Dan,
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How do you pass an ActiveX Variant from an external application to LabVIEW?

Background: I created a LabVIEW ActiveX server. I can access it with my external application (Matlab). I have a control variable in my LabVIEW executable. I want to use Active X to set the value of my control variable from my external application.
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The control variable should be a refnum and it would have to be wired to Automation Open with the correct reference.
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LabView 8.5 ActiveX Variant Data

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Attachments:
ActiveX.jpg ‏52 KB

That sounds like you don't have the Visual Basic Help files installed. A "normal" installation of Excel doesn't install this. You have to install them using "advanced customization" of the application. If you're installing Excel as part of office this checkbox is present right below where you select which product(s) to install. Then, in the "Advanced customization" window expand "Office Shared Features". Then make sure that the item "Visual Basic for Applications" and its child entry "VIsual Basic Help" are both selected to be "Run from My Computer".
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Text Message sent from LabVIEW using ActiveX and Internet Explorer

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Solved!
Go to Solution.
Attachments:
My Texting.vi ‏38 KB

MoonMan wrote:
Well it sure seemed like that should have worked but no luck. When I try to add the FormElement with submit in my VI after I wire in the reference wire it automaticaly changes to a regular Element. Then it wont run because submit is not an option for Element, I have to change the submit back to click.
I dont understand, it really seems like the click should work, and it seems like the submit should have also worked. Getting text into the different fields was easy enough.
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ActiveX Variant Pointer - Variant?

Hello.
I have an ActiveX control that requires a VARIANT to be passed in. The VARIANT needs to contain a SAFEARRAY of int32s. I have a DLL that assembles the variant SAFEARRAY from a standard LabVIEW array. However, because of limitations on Call Library Function Nodes my DLL function has arguments of long * and VARIANT *. So I end up with a VARIANT pointer rather than a plain VARIANT.
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> But I need to do something different because wiring an LV array
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>
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