how to send a command from a vc++.exe to LABVIEW.exe in order to control the button on the LABVIEW.exe

[hummingbird]

Hello, everyone. Using VC++, I have gotten the handle of a *.exe(built by Labview), but I cannot get the button handle. I want to get the button handle and post the message to control the button. How can I do that? When I use the SPY++, the *.exe(built by Labview) have not any child windows which is very different from the *.exe(built by VC++). In SPY++, what is the LVDChild class? How can I send the message to control the button on *.exe(built by Labview)???

That is  to send a command from a vc++.exe to LABVIEW.exe in order to control the button on the LABVIEW.exe. How can I get it ?

Thank you!

[Wiebe@CARYA]

"hummingbird" <x@no.email> wrote in message news:1165999208670-453351@exchange.ni.com...
Hello, everyone. Using VC++, I have gotten the handle of a *.exe(built by Labview), but I cannot get the button handle. I want to get the button handle and post the message to control the button. How can I do that? When I use the SPY++, the *.exe(built by Labview) have not any child windows which is very different from the *.exe(built by VC++). In SPY++, what is the LVDChild class? How can I send the message to control the button on *.exe(built by Labview)???


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That is &nbsp;to send a command from a vc++.exe to LABVIEW.exe in order to control the button on the LABVIEW.exe. How can I get it ?


Thank you!


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Duplicate post... Duplicate awnser:




LabVIEW doesn't use windows controls (so it can be platform independent). So you can't send messages to a button to click a button. You could send mouse click events to the window.


The proper way to do it would be to open an application reference (with ActiveX) to the LabVIEW exe, and get a vi reference, and use vi server to raise a value signalling event. That is all new to me though.


Regards,


Wiebe.

[hummingbird]

Thank you! But I dont kown how to use vi server to raise a value signalling event. Can we put vi server into the vc program? Can you give me some more information or some examples, hehe!

hummingbird

[rolfk]

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@hummingbird wrote:

Thank you! But I dont kown how to use vi server to raise a value signalling event. Can we put vi server into the vc program? Can you give me some more information or some examples, hehe!

hummingbird

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Checkout the LabVIEW ActiveX server interface in the User Manual in Chapter 20, Windows Connectivity and the VI Server Reference in Chapter 17, Programmatically Controlling VIs.

There is a sample for Visual Basic under examples/comm/VBtoLV.frm, which should be quite simple to translate to Visual C as long as you can figure out the basics of ActiveX programming in VC (I have never done anything with ActiveX in VC). For those basics I would recommend some text book or MSDN.

Rolf Kalbermatter