MS Access Runtime Activex Object

Hello All,
I have one pc where I installed Access 2010 Full version and one pc with a Access Runtime.
On the pc with the full version i can create a ActiveX "Access.Application" Class and run all
properties and methods.
That's not possible with the Runtime version. The Reference to the ActiveX Access Runetime is always Null.
I found this side http://support.microsoft.com/kb/210132/en-us to solve the problem, but I didn't know
how to create such a source code in labview.
In the false case of my VI you see the runtime method, but I do not know how to continue
at this Point (relating to the link):
Run-Time Version of Microsoft Access
4. Type the following procedure
Does somebody know how to create the "GetObject" Method in labview?
Thanks!
Attachments:
c_printReportAccess (DA504).vi ‏24 KB
shellexecute (DA504).vi ‏15 KB

Hi,
Did you have a look into this whitepaper? I think you can find some usefull help there.
Converting Visual Basic ActiveX Examples to Equivalent LabVIEW
http://www.ni.com/white-paper/2734/en
Regards,
Thomas

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Line SourceCde
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Chosen variables
Name
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No.      21 Ty.          METHOD
Name CL_WDR_VIEW_ELEMENT_ADAPTER=>GET_ATTRIBUTE_EXTERNAL
I_BINDING
    0000000C
    D0000002
E_VALUE
SY-REPID
    CL_WDR_VIEW_ELEMENT_ADAPTER===CP
    0000000000000000000000000000000000000000
    0000000000000000000000000000000000000000
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%_DUMMY$$
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ATTRIBUTE-ATTRIBUTE_NAME
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    000000
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I_BINDING->ATTRIBUTE_NAME
    USERNR
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=======================================================================
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Edited by: Reema Shahbazkar on Jun 12, 2008 3:28 AM

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Many objects in object-oriented programming have an
identity, such as a file, a front-panel object or a hardware device.
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irritating the community of LabVIEW users since the release of LabVOOP
a few months ago.
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I'd like to start this thread to discuss these two issues.
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inter-thread synchronization is traditionally done. However, besides
the mutex based locking, the computer science community has innovated
also different kinds of methods on synchronizing the access to objects.
One way to get object-level synchronization is modify the
runtime engine so that it only allows a single method of a synchronized
object to run at any time. This mechanism of syncrhonization is
implemented in programming languages like O'Haskell, which is a Haskell
variant with object orirented features.
Also different
transactional mechanisms[1,2] have been successful. In transactional
mechanisms multiple threads are allowed to access a synchronized object
simultaneously. As each method accessing an object commits their
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simultaneously in a manner than would break the transaction. If such a
modification has occurred, everything is rolled back. Transactional
mechanism do not suit to every possible situation as not everything can
be rolled back. For example it's hard to roll back an action that
somehow modifies the physical world.
User experience of synchronization
How
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directly visible to the developer end-user. The developer should
understand the general concepts of synchronization to take full
advantage of it, but in general the synhronization mechanism should be
integrated directly to development environment. There should in general
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the end-user should be able to specify which data needs synhronized
access in more sophisticated way.
In the following I propose a
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the development environemnt of LabVIEW. The proposal is very
preliminary but I hope it breaks the ice and the community would start
innovating in how should NI implement the syncrhonization support in
the user interface of LabVIEW.
Wire level synchronization
Only
methods can access object private data members. In synchronized access
to the object, it's the methods accessing the private data members that
need to be synchronized. The private data members are accessed by
applying unbundle node to the class wire and data is written back to
the object using bundle node.
What I propose is the following.
An unbundle node could either be normal or "synchronized". A
synchronized unbundle would guarantee the access to the private data
members in synchronized manner. All data wires originating from
synchronized unbundle would be of synchronized type, in a little
similar manner as a dynamic dispatch wire is of special dynamic
dispatch type. Such a wire must evetually be connected to a bundle
node. When the wire is bundled back to the originating object, the
synchronization requirement is released.
These synchronized
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developer instantly knows that the wire is synchronized. The developer
can branch the wire, but only one wire branch can own the synchronized
type. The developer could easily select which wire would be
syncrhonized by Ctrl+clicking the wire. Such a wire can be considered
as a combination of a data and a mutex, even though mutexes don't need
to be the underlying synchronization method. The wire just guarantees
that there is a mechanism in the runtime engine that makes sure the
access to the wire data is synchronized.
There is a need to wire
data originating from a non-synchronized wire to a synchronized wire so
that it can replace the private data member of the class. This is
accomplished with a new node similar to bundle node, that would allow
replacing the data in a syncrhonized wire with some data originating
from a non-synchronized wire.
The synchronized wire can be
connected to a front panel controls of special syncrhonized type. This
way the synchronized wire can originate from a method and allow passing
the synchronized data to the calling VI and back to another method.
This is practical for example in a situation when the developer wants
to run different analyzes to a data class but don't want to rewrite all
the existing data analysis tools as class members. So the developers
writes a syncrhonization acquiring getData method that let's the
calling VI to access the syncrhonized data. Then the developer passes
this data to an analysis VI and passes the result back to a setData
method that writes the result back to the class wire.
There
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the programming model for all nodes that do not support such
synchronized wires will be branching the wire and passing the
non-synchronized wire branch to the node and then bundling the result
back to the synchronized wire.
To increase performance and
decrease unnecessary buffer copies when a syncrhonized wire is
branched, if the syncrhonized wire continues directly to the new bundle
synchronized wire node, no buffer copy is made.
Discussion
The
syncrhonized access to a by-ref LabVOOP objects can be implemented in
multiple ways by National Instruments. The synchronized access should
be divided to two different and independent parts: 1) the user
experience of synchronization and 2) the runtime engine synchronization
mechanisms. As LabVOOP objects have special properties compared to
other LabVIEW data types, optimal user experience can be gained by
designing the user experience specifically for LabVOOP objects. From
user experience point-of-view this syncrhonization mechanism may not
work for other data types. Separating object syncrhonization from
synchronization of other data types is advantageous also for other
reasons. Due to the fact that object data can only be accessed via
object methods, more advanced synchronization methods may be used with
objects than can be used with other data types. O'Haskell
synchronization implementation is an example of this. Integrating the
synchronization directly to the user interface allows NI to change the
mehcanisms under the hood, when computer science comes up with more
advanced methods. Therefore NI could begin with traditional and quite
easy mutex-based synchronization and later move to more advanced
perhaps transaction based syncrhonization methods or even combinations
of multiple different methods.
I hope this topic generates
discussion that would help NI to implement an excellent synchronization
mechanism in LabVOOP. I hope that all talented individuals in the
community participate this discussion to help NI to reach this goal. I
also hope that if you just have time, it would be great if you could
surf the computer science resources to find out what kinds of new
techniques there exists for synchronizing access to shared resources. A
Large community may find much more innovative solutions than a few engineers at NI. Let's give NI the power of open source design
Tomi Maila

Hello Tomi,
First, thank you for taking the time to write such a well
though-out suggestion. Are you familiar
with the “LabVIEW Object-Oriented Programming: The Decisions Behind the Design”
document? I think the reason we chose to implement a ‘by
value’ strategy, is that is more in line with the LabVIEW programming paradigm
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server is present!*

Variant Input Parameters with ActiveX Objects

I've created an ActiveX library that exports a variety of objects using Visual C++ Version 6.0. I'm testing the methods and properties of these objects using both LabVIEW and Visual Basic clients. The problem I'm facing is that when testing under LabVIEW, I can't access methods that expect a VARIANT input parameter. The declaration in C++ of one object's such method looks like this:
void CChassis::Configure (VARIANT config, int rate);
I can create the ActiveX object with both LabVIEW and Visual Basic. I can invoke methods that do not use VARIANT input parameters using both as well; but, when I create a second ActiveX Object (a CConfiguration) and use the LabVIEW Variant operator, my attempt to invoke Configure fails with a "No Such Interface (E_NOINTERFACE)" error. The invocation fails identically if I wire the CConfiguration directly to the Variant input, as well. If I instead create a constant VARIANT as an input parameter, my Configure method gets called, although the method recognizes that I passed an invalid object.
Using Visual Basic I can invoke the Configure method without problems while encapsulating a CConfiguration object within a Variant.
So my question is, have I found a LabVIEW error, or is my approach flawed? If my approach is flawed, where have I gone wrong? Thanks in advance! I'm using LabVIEW version 7.0.

Hi,
Have you tried to put in plain data or an object reference into your variant parameter?
I think plain data should work... for object references i don't know.
Some time ago, i also coded a small activex library, where i passed object references by parameters in delphi. I did not use variant parameters, but the real interfacedeclaration types (like IMyObject**). This worked fine. I also uses "dual" interfaces for the objects, which get passed by parameter. But i don't really know if this is helpfull for vb.
Finally, you can also use a workaround:
For each of your Objects, that you want to use from LabView and which you want to pass by a parameter, you
insert an new Property "int32 Object_Handle".
When an Object gets created, it ask a "ObjectHandleManager" (gets written by you) to get an own unique Object_Handle which it stores into its property "Object_Handle".
The ObjectHandleManager generates an new Object Handle and memorizes the Handle assoziated with the calling object's reference.
Now, at each time, when you want to pass a object reference to a library function of your self, you can pass the Object_handle as an integer value. In the called function, you can ask your ObjectHandleManager for the real ObjectReference.
But thats not a very comfortable workaround.

Cannot access a disposed object that was just created.

Here is my code:
Imports System.Data.SqlClient
Imports System.Diagnostics
Imports System.IO
Imports System.Threading
Imports System.Text
Imports System.Windows.Forms
Module MigrationControl
Dim FormBulkLoadFailed As MessagePlatform
If runCommand(comSQL, cmdLoad, True) = -99 Then
'Informing user the Bulk Load failed.
FormBulkLoadFailed = New MessagePlatform(11)
FormBulkLoadFailed.ShowDialog()
End
End If
The FormBulkLoadFailed.ShowDialog() does nothing and the runtime properties says:
Cannot access a disposed object.
Object name: 'MessagePlatform'
How can something that was just created already be disposed?
Thank you,
Charlie

Does the MessagePlayform accept constructor accept an integer parameter? You are passing an 11 to the form. You probably have two constructors in the form. The default with zero parameters and the one you are using with one parameter.
I suspect the constructor is closing the form before it is displayed. Test for nothing like in the changes below
Dim FormBulkLoadFailed As MessagePlatform
If runCommand(comSQL, cmdLoad, True) = -99 Then
'Informing user the Bulk Load failed.
FormBulkLoadFailed = New MessagePlatform(11)
if not FormBulkLoadFailed is nothing then
FormBulkLoadFailed.ShowDialog()
End
End If
jdweng

Getting "Connect Timedout or auth error" when usging UltraVNC ActiveX object in LV 2010

Hi all,
I am trying to use a VNC viewer activeX object (from: UltraVNC ActiveX Viewer) in Labview to start a remote desktop / VNC session. The example supplied along with the control is a HTML page with javascript invoking the object.
Initially, I tried using the object by directly inserting it into an ActiveX container, but it never worked. So, I altered the design and inserted a WebBrowser object in the ActiveX container and used the Navigate2 method to open the local .htm file (that contains the exact same code as shown in example, but with altered Server address to match my local condition). Yet, even this method fails. As soon as the control passes to the Browser:Navigate2 method, I get an error stating "Connect method failed as it timed out or authentication failure". Just to make sure there is no error with the html file itself, I opened the file in Internet Explorer and it works without issues, after first allowing the ActiveX to run (throws up a banner on top of the page saying "it is unsafe to run the activeX" (IE's security measure).
Did anyone use this before? I just want the VNC Viewer functionality in Labview, so any alternate suggestions are welcome too.
Regards,
Sri Ved

Tested the solution, but did not work. Attached is the screen shot of the error, if it helps. Also, I ensured all the variables under ActiveX and Scripting are set to "Enable" in IE Security Settings (listed below) in both the Internet and Intranet categories. Is there something obvious that I am missing?
Regards,
Sri
Enabled:
  Allow previously unused ActiveX controls to run without prompt
  Allow Scriptlets
  Automatic prompting for ActiveX controls
  Binary and script behavior
  Display video and animation on a webpage that does not use external media player
  Download signed ActiveX controls (not secure)
  Download unsigned ActiveX controls
  Initialize and script ActiveX contrtols not marked as safe for scripting
  Only allow approved domains to use ActiveX without prompt
  Run ActiveX controls and plug-ins
  Script ActiveX controls marked safe for scripting*
  Scripting:
  Allow programmatic clipboard access
  Allow status bar updates via script
Allow websites to prompt for information using scripted windows
Enable XSS Filter
Scripting of java applets
Attachments:
ActiveX_VNC_Error.jpg ‏134 KB

Microsoft Jscript runtime error: Object expected

I have a Visual Studio 2005 web application that uses a Crystal Viewer to display reports developed in XI. When I run the application on my development PC, I get no error, even with the debug turned on in IE7. When I run the application on my PC, using the web server address and click on the drop down to select the parameter, I get an error that says; u201CMicrosoft Jscript runtime error: Object expectedu201D. Both my development PC and the code published on the web server use the fully qualified report path down to the webserver name. No problem on my development PC running in Visual Studio, but a problem accessing the server. The onClick portion is the highlighted area is where the debug stops. This is code that is created from crystal. Originally, I was getting an error; 'Load Report Failed', but once I used the full path name of the report down the the webserver name, that error disappeared. I have XI installed on the web server and I can open and run the reports there. What am I missing on the web server? Thanks.

That would be the CR Service Pack located here:
https://smpdl.sap-ag.de/~sapidp/012002523100006255422008E/crxir2_sp4_inc.exe
You will then have to ensure that the same runtime is on the server. Use the msm or msi files from here:
http://resources.businessobjects.com/support/communityCS/FilesAndUpdates/crxir2sp4_net_merge_modules.zip
https://smpdl.sap-ag.de/~sapidp/012002523100009657852008E/crxir2sp4_net_si.zip
I'd recommend the msi as it does not require you to build a deployment project. Ensure that you uninstall the current CR runtime on the server. Also, once that is done, check to make sure that the c:\program files\business objects directory is removed. Then install the CR runtime using the above msi file.
Ludek

Inserting ActiveX Objects

I have installed Labview 64 bit onto my computer and downloaded the full 4Gb driver compilation. I am trying to use labview to run a motor control for my TPZ001 Thorlabs piezo controller. When I go to "Insert ActiveX Object", in the list of controls MG17Motor is no where to be found. This is the control I need for my motor and from what I gathered from my colleages this control should appear after having installed the Thorlabs ATP config/user CD application. I have also plugged the piezo controller into my computer's USB and got the successfully installed drivers message. Even after the 4Gb driver installation the motor control in activeX cannot be found. Am I overlooking something simple? The driver set installed in \Program Files (x86)\ even though everything is 64 bit, when I tried to change the install directory it said that my choice of \Program Files\ was invalid.
Where awareness goes, energy flows.

nathand wrote:
There's more than one way to use an ActiveX object in LabVIEW. I may not use the correct ActiveX terminology, but there's a difference between an ActiveX control versus an ActiveX class. Only ActiveX controls can be inserted on the front panel. You can get access to an ActiveX class by using the "Automation Open" primitive found in the Connectivity->ActiveX palette. Create a constant for the Automation Refnum input, then right-click on the constant and choose "Select ActiveX Class..." See if you can then open your component there.
Hi nathand, can you explain a bit further what you mean? I have attached my code if you weant to have a look at what it is supposed to do.
Attachments:
READERxp.vi ‏39 KB

Web-UI error message "Access via 'NULL' object reference not possible"

I need some help, I'm not a Basis person but I need to get this connection problem resolve.
This problem is in our DEV ICWeb system. After logging in to Web-UI, I got a error message "Access via 'NULL' object reference not possible". We have 3 clients (100, 220, & 310) in DEV and all 3 clients are giving me the same error message.
From the help.sap.com, I found this topic http://help.sap.com/saphelp_nwes70/helpdata/en/84/43f0d786304e19a652a8f80909a8ec/content.htm
but in the document it asked to go to SM59 to check the ESH_APPL_WS_TEMPLATEENGINE destination. But we don't have that destination setup in all our systems.
Here is the complete error message:
Error when processing your request
What has happened?
The URL http://crm-dev.staff.copa:8000/sap/bc/bsp/sap/crm_ui_frame/BSPWDApplication.do was not called due to an error.
Note
■The following error text was processed in the system CD1 : Access via 'NULL' object reference not possible.
■The error occurred on the application server CRM-DEV_CD1_00 and in the work process 0 .
■The termination type was: RABAX_STATE
■The ABAP call stack was:
Method: GET_DATA_LOSS_HANDLER of program CL_CRM_UI_CORE_APPL_CONTROLLERCP
Method: GET_DATA_LOSS_HANDLER of program CL_CRM_UI_CORE_APPL_CONTROLLERCP
Method: EH_TRIGGER_NAVIGATION of program CL_CRM_UI_CORE_APPL_CONTROLLERCP
Method: SET_WORKAREA_CONTENT of program CL_CRM_UI_CORE_APPL_CONTROLLERCP
Method: PROCESS_NAV_QUEUE of program CL_BSP_WD_VIEW_MANAGER========CP
Method: DO_INIT of program CL_CRM_UI_FRAME_APP_CONTROLLERCP
Method: DO_INIT of program CL_BSP_CTRL_ADAPTER===========CP
Method: GET_PAGE_CONTEXT_CURRENT of program CL_BSP_CONTEXT================CP
Method: ON_REQUEST_ENTER of program CL_BSP_RUNTIME================CP
Method: ON_REQUEST of program CL_BSP_RUNTIME================CP
What can I do?
■If the termination type was RABAX_STATE, then you can find more information on the cause of the termination in the system CD1 in transaction ST22.
■If the termination type was ABORT_MESSAGE_STATE, then you can find more information on the cause of the termination on the application server CRM-DEV_CD1_00 in transaction SM21.

Hi Michael,
Refer to the link below and check the procedure.
http://help.sap.com/saphelp_nwes70/helpdata/en/84/43f0d786304e19a652a8f80909a8ec/content.htm
Regards,
Arjun

MS Access Runtime Activex Object

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