Activex question in labview

Hello,
I am trying to controll an 8753ES with the agilent intulink through labview using activex. I have read about activex in labview, and and help file for intulink, which says:
In order to use the Agilent IntuiLink VNA Automation Server, a Visual Basic program must reference two servers. Under the Visual Basic Project | References… menu item, include the following two references:
· BLXL Servers: Check the box for Agilent IntuLink Servers Common Interfaces. As the description suggests, this library contains definitions of common interfaces. In particular, this library defines some enumerated types, used by Agilent IntuiLink Automation Servers.
· AgtServer8714: Check the box for Agilent VNA Network Analyzer Automation Server. This library contains definitions specific to the supported network analyzer products.
Object Hierarchy
AgtServer8714 Object
Provides methods to obtain data, obtain graphics, save and restore calibration and state, and to establish and close a connection to a network analyzer.
AgtMeasure8714 Object
Provides methods to obtain scalar parameters from the network analyzer. Most of these are setup parameters.
AgtUtilities8714 Object
Use the AgtUtilities8714 Object to:
· Work with the network analyzer connection to the PC.
· Work with the network analyzer descriptions and identity.
Now, I have constructed what I think is the correct implementation in labview (see atachment), but when I run it I get an error that makes it seem like an i/o refernce is not included:
Exception occured in AgtServer8714.AgtServer8714.1: CAgtServer8714::Connect method failed. CAgtCore8714::Connect method failed. CAgtConnectObject::CreateIO method failed. in vna_activex.vi
What I really want to know is, how do the references that are required for a program in vb work in labview? I looked up a vb sample for intulink, and they include four references:
Reference=*\G{00020430-0000-0000-C000-000000000046}#2.0#0#..\..\..\..\..\..\WINNT\System32\STDOLE2.TLB#OLE Automation
Reference=*\G{06EB23A2-C6C1-8714-98B5-080009C12B46}#1.0#0#..\..\..\..\..\..\Program Files\Agilent\IntuiLink\VNA\AgtServer8714.dll#AgtServer8714Lib
Reference=*\G{D753C10E-EF9A-11D3-98B9-080009C12B46}#1.0#0#..\..\..\..\..\..\Program Files\Common Files\Agilent\IntuiLink\BLXLServers.dll#Agilent IntuiLink Servers Common Interfaces
Reference=*\G{6B263850-900B-11D0-9484-00A0C91110ED}#1.0#0#..\..\..\..\..\..\WINNT\System32\msstdfmt.dll#Microsoft Data Formatting Object Library 6.0 (SP4)
It seems like in labview, there is nothing else that is reading the reference when I do an automation open. Any help at all is welcome. Also, if you know of any labview examples that use intulink, that would be great.
Thanks,
Eric
Attachments:
vna_activex.vi ‏11 KB

Here is a link to the Agilent8753ES instrument drivers from www.ni.com/idnet:
http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=1625
Brian
Brian G.

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news:3b05a593@newsgroups....
> Hello guys:
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[email protected]
"Pierce, Eric - TNCB-TPP-2"
05/01/2003 08:05 AM
To: [email protected]
cc:
Subject: The list of question i never sent
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Plataforma Solar de Almeria.

Exactly, but really the code of above it's only an example that I want to do. I'm trying something more sophisticated.
I want to create an ActiveX control that could work as stand alone executation with the ability of directly get some indicator values from its LabVIEW VI container and depending of those values, set the control values of others LABVIEW VIs. I really know that within LabVIEW itself I can get/set those indicators/controls, but with this method I think that the diagram block of the LabVIEW VI container can be more simple.

Some questions on Labview under KDE4 and GNOME

I have some questions regarding KDE4 an GNOME with Labview for Linux. I'm trying to help a colleague get somethings working with regards to these desktop environments.
1. KDE4: When I try to open a VI directly through Dolphin (the default file manager under KDE4)..and the file (lets say ABCD.VI) is located in say /home/user/Test VI/ABCD.vi. When I double click, Labview starts and says that "/home/user/Test" is not a valid VI and it just errors out and refuses to open. It refuses to honor any whitespaces under KDE4 is what I've noticed. I haven't noticed this under KDE3.
2. GNOME: There are no icons for .vi files after installation, even though the desktop support for GNOME is installed during the install process.
Would appreciate some help!

Hi Anshul,
What version of Mandriva do you see this in? We only official test for and support a couple distributions (SUSE is only supported up to 10.3): http://digital.ni.com/public.nsf/websearch/35D2B5E483A001A18625716B005BE464?OpenDocument
Regards,
Jeremy_B
Applications Engineer
National Instruments

ActiveX wrapper for Labview

Hello!
My name is Daniel. I'm from Argentina and I work in Tracnova S.A.
Tracnova is the Distributors of NI in Argentina.
I am having an issue with ActiveX development for wrapper an dll driver.
I have to read strain gage aquisition data from an USB device of MANTRACOURT (http://www.mantracourt.co.uk/products/wireless-telemetry).
The manufacturer provide an dll driver. It's shipped with example for VB6 that I have been testing and it works fine.
BUT I HAVE TO USE IT IN LABVIEW.
My first problem is that I have to provide an CALLBACK function pointer as parameter to "INITIALISE" function of the dll. Here is an excerpt from the
example that is shipped (Excerpt from a form module):
Private Sub Form_Load()
    'we will only handle base station addresses of 1
    iBaseAddress = 1
    Caption = Caption & " [DLL v" & VERSION & "]"
    CLOSEPORT
    'set the callback so we can receive data provider packets
    Init AddressOf CallBack ''''''----------------->>>>>>>>>>>>>>>> CALLBACK function pointer as parameter to "INITIALISE" (It defined as Init)
    'Open USB interface
    ok = OPENUSB
    If ok <> 0 Then
        ShowMessage "Cannot open USB interface!" & vbNewLine
    End If
End Sub
"CallBack" function is contained within .bas. Because You can only retrieve the address to a function or sub (public or private) contained within a
Standard VB Module. There's no way around this.
Here is an excerpt from the example that is shipped (excerpt from a Standard Module):
Sub CallBack(ByRef StringPtr As Long, Length As Long)
    Dim PBMsg As String, rc As Long, pEnd As Long
    Dim p(128) As Byte
    Dim cH As Byte
    Dim tID As Long
    Dim C As Integer
    On Error Resume Next
    CopyMemory p(0), ByVal StringPtr, Length
    PBMsg = Left$(StrConv(p(), vbUnicode), Length)
    'strip off the base station wrapper
    PBMsg = Mid$(PBMsg, 4, Len(PBMsg) - 5)
    If PBMsg <> "" Then
        Debug.Print CVStr2HEX(PBMsg)
        Select Case Asc(Mid$(PBMsg, 1, 1)) And &H1F
        Case PT_DATA_PROVIDER
            'pass data to the main form if we are not closing
            If Not Closing Then MainFrm.ShowMessage "DATA_PROVIDER Data Tag=" & Replace$(CVStr2HEX(Mid$(PBMsg, 2, 2)), " ", "") & " Data=" & Decode
(Mid$(PBMsg, 5, Len(PBMsg) - 6)) & vbNewLine
        End Select
    End If
End Sub
Then, when an data packet arrived, the driver call to "CallBack" function instead, so I can process it and do what I need.
But I can't pass pointer to function IN LABVIEW WITH "LOAD LIBRARY FUNCTION". So I did an ActiveX in VB6 for wrapping the dll of the driver. I attached the
files tha I did. The ActiveX sends an event to labVIEW everytime that a data packet arrived. I trigger an event inside the CallBack function that it's
not working, but if outside (look inside Iniciar() function where I wrote "This is the first event", the event trigger works.)
Why is not THE CALLBACK FUNCTION TRIGGERING THE EVENT INSIDE THE LABVIEW??
I also tried to make a Win32 DLL with C + + using PostLVUserEvent, but neither worked for me. I can send the code in C + + if you want to review.
Thank you for your consideration. I look forward to hearing from you.
Best Regards
Daniel Lopez
Design Engineer
TRACNOVA SA
www.tracnova.com
Attachments:
ActiveXPropia.zip ‏459 KB

Thanks a lot nyc for your kind reply.
Yes, you are right. They have COM driver, but the event does not fire in labview. Also, this driver does not implement a COM circular buffer which means that if you delay reading and processing the data, these are lost because they are rewritten. I have been asking for support to MANTRACOURT, but after several attempts, they told me they do not provide support for labview only for VB, VBA excel, and some other more, not even C + +
National I miss to much. Nice technical support !
Please help, I need to fix this issue
Thanks a lot!
Daniel

Activex question in labview

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