How do I create a .dll?

When I select Project -> Add Reference -> Solution -> Browse ... it wants a .dll, .tlb, etc. Perhaps I need to convert my Library.cs into a Library.dll? How do I create a .dll?
bhs67

This is actually another question but you will have to add references to some other assemblies from the class library project. If you for example use a class in the System.Windows.Control namespace in your class library project you must add a reference to
PresentationFramework.dll where these classes are defined.
If you are trying to create an assembly containing WPF controls you should create a "WPF Custom Control Library" or a "WPF User Control Library" project (Visual C#->Windows Desktop->...) instead a Class Library project. Then you
will get a lot of required refrerences "for free".
Please remember to close your threads by marking helpful posts as answer and please start a new thread if you have a new question.

Similar Messages

How to create a dll in Java?

I have written some code in Java to perform a certain function.
How can I create a dll for this code? Would I be able to call this dll from any platform?

Let me rephrase the question. I would like to create a dll for code that is written in Java.
Can you please tell me the procedure to do that?
I want to be able to call this dll from .Net framework or any other application. I found examples online to do the opposite using JNI.

How to create a dll from vi in Labview 7.0 ?

Hello,
I want to create a dll from a vi in Labview 7.0.
I've found the url: http://zone.ni.com/devzone/conceptd.nsf/webmain/003A3E6A5E9CCCEC8625691F0072B2C5
explaining how to create DLLs from LabVIEW in Labview 6.0i but this method is not available in my Labview 7.0.
How is it possible to create a dll from a vi or from vi's (stored in llb-files) ?
With thanks,
best regards,
Geert

You can only create DLLs and Standalone Applications if you have LabVIEW professional or higher.
If you only have LabVIEW Base of Full, you need to purchase the Application builder seperately.
(Check under "Deployment tools" in the LabVIEW comparison matrix. What level do you have?)
Message Edited by altenbach on 10-18-2005 08:45 AM
LabVIEW Champion . Do more with less code and in less time .

How to create a .DLL file from a .C file ?

Hi everybody
I'm looking for a method how to create a .DLL file from a .C file .That Dll file will be used to perform a board to measure voice quality accoding to the international standard named PESQ (perceptual evaluation of speech qualty) P.862.
Can anyone help to start dealing with Dlls and give some advices to avoid errors ?
thx
Attachments:
source.zip ‏37 KB

Hi sinaps,
You mention that you want to create a DLL from a .C file. Just to clarify, are you using C (.c file) or C++ (.cpp) to write your code?
Also, if you are using C++, are you using Visual Studio? (The reason I ask is because this forum is geared towards Measurement Studio, which is an add on to Microsoft Visual Studio).
That being said,
If you are using C: National Instruments provides an ANSI C Application Development Environment called LabWindows/CVI which makes building dlls a snap. It has templates for DLLs and you can build them either as stdcall or cdecl dlls.
Developer Zone Tutorial: Building a DLL with LabWindows/CVI 8.5 for use with LabVIEW 8.5
If you are using Visual C++: Look at the link that Al provided earlier.
MSDN: Walkthrough: Creating and Using a Dynamic Link Library
If you aren't using CVI or Visual Studio, then really the best bet is to do a google search for "Create C DLL" or post or a forum for the appropriate environment that you are using.
Thanks!
Message Edited by Jervin_J on 03-14-2009 02:02 PM
Jervin Justin
NI TestStand Product Manager

How to create a dll with strong name

Hi All,
For some security purpose, I need to create a dll with strong name by packaging the bean. I am able to create a dll from the bean but how do I create a strong name(sign) dll? I tried using jarsigner utility to sign the jar and then convert it into dll using packager utility but still the resulting dll is not signed. Please anyone let me know how can generate a signed dll by packaging my bean. Any suggestion/help is most welcome. Thanks in advance.

Good information on strong names:
http://www.ondotnet.com/pub/a/dotnet/2003/04/28/strongnaming.html
Step-by-step procedure:
1. Download Signer from Codeplex. No installation is necessary.
2. Backup your unsigned assemblies
3. Open the Visual Studio Command prompt or otherwise make sure that your PATH includes the .NET SDK binaries, and change to the directory where your assemblies are located
4. In a command window, execute:
PATH_TO_SIGNER.EXE\signer -k FILENAME OF YOUR KEY -outdir TARGET DIR -a YOUR DLL
5. The resulting assemblies should now have a valid strong name from your company key. You can check this with:
sn -T YOUR DLL
The public key token must match the token of your public key.
BTW - this is totally unrelated to Java Programming.

How to create a DLL for LabVIEW in MatLab

I want to use MatLab-Code from an M-file in LabView without MatLab. So i decide to use external code in a DLL. Can anybody give me some hints - how to do? (How to create, how to use?)
Used System Windows 98, LabVIEW 6.1, MatLab 6.1 R12.1
Thanks

Hi,
I use Matlab-Code in Labview and it's don't need create a dll. The LV was a tool, matlab script, you can write your code Matlab here. see the examples of LV.I think the lV 6.1 have.
Dll it's very complicated

How create a DLL with module python?

Hello,
I am a beginner in TestStand,
I would like to know, how create a DLL with module Python? because for create a sequence, we must own a DLL.
Thank you for your answer
Vincent
Solved!
Go to Solution.

Hello,
I would like use TestStand with Python module. So I believe, we must use a DLL for execute a test, I'm wrong because I can use .exe for realize a test.
Now I know how use TestStand with Python module but I have a mistake. I wonder which is error 255?
Whereas I use .exe in Language C, I have no error.
Thank you for your anwser.
Vincent
Attachments:
Setup_Test.jpg ‏244 KB
Report.jpg ‏258 KB

How do I create a fault-tolerant DLL call from LV?

I've created an .exe from a VI that calls a DLL, when that DLL crashes,
it crashes the whole application. This DLL is too complicated to
completely debug and it, in turn calls DLLs I have no control
over. It crashes approximately once every 100,000 iterations.
How do I make a DLL call fault-tolerent?
Attachments:
crash.gif ‏19 KB

I might not have been very clear in my answer - this isn't a feature that CAN be added to LabVIEW...the DLL threw an unhandled exception across a DLL interface - which pretty much means a system exception (code shouldn't be throwing language exceptions across DLL boundaries as they are language specific). This means that something went very wrong with the code and there is a good chance that the process space has been corrupted. And from my own debugging experience, if it's only crashing 1 time out of 100,000, that doesn't mean it isn't corrupting memory or otherwise causing problems...it was just the time it was caught.
Considering this, the Call Library Node already is fault tolerant - we catch the exception and report it to the user. You have a valid position that we should simply return this as an error. It's also a valid position that it would be a road paved with good intentions. All you need to do is remember what life was like in Windows 3.1 - where one process could silently corrupt another - to realize the amount of untraceable errors that could occur. Yes, the error out value should be handled by the user, but when an application of 100's or 1000's of VIs crashes seemingly at random because someone didn't, you can see the problem.
I will say I like the idea of a separate memory space. It is unfortunate that Windows only offers that through creating a separate process, but it is a neat idea. I worked in the VXI/VME world for a while, which does have multiple address spaces.
BTW - using signal handlers to catch exceptions is unfortunately not a 100% solution...signals are a partial port of a Unix concept in Windows. You would be best to use SEH around the call (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccelng/htm/key_s-z_4.asp). If the DLL is already a C++ DLL, then you can use the global catch of C++ instead
int err = 0;
try {
} catch(...) {
err = -1;
Again, you still are at risk of a corrupted process, but this allows you to avoid our handling of it.
Having spent years writing and (god help me) debugging device drivers, I love this topic. If you want to talk more about it and various options, feel free to shoot me an email at [email protected].
Brian Tyler
http://detritus.blogs.com/lycangeek

How to create a dll file for lab view?

Hello
I want to create a DLL file for LabView. Can anyone help me in this issue?
Regards
Vivek

Please explain.
Do you want to create a dll in another language (which one?) for use in LabVIEW or do you want to create a dll out of your LabVIEW code?
LabVIEW Champion . Do more with less code and in less time .

How to create a dll in LabVIEW with a 2D array

I'm attempting to create a dll in LabVIEW with the following parameters from Test DLL.vi:
Inputs:
IN1 - Word
Buffer - 2D array of Unsigned Byte
Output:
OUT1 - Unsigned Byte
The prototype is constructed as follows in the Build Specifications of the Project:
uint8_t TestDLL(int16_t IN1, TD1Hdl *Buffer)
The dll builds successfully but when I attempt to use it in another VI (using the Call Library Function block) the prototype appears but it does not look like what was defined from the Build Specifications. Instead it looks like the following:
void TestDll(void );
I attached some screen shots of all the settings as described above.
Attachments:
Test DLL Front Panel.JPG ‏85 KB
DLL Prototype Before.JPG ‏84 KB
DLL Prototype After.JPG ‏54 KB

The Test DLL.vi is what I used to create dll prototype with in the Build Specifications in the project.
Note: There is no logic implemented yet.
Attachments:
Test DLL.vi ‏7 KB

How to create a DLL in CVI which can be used in MFC?

I want to create a DLL in CVI and use the DLL in MFC. But even if I tried
many ways, I cannot reach the objective. There are always link errors. Could
you give me some instructions about it?

I once made a DLL that I could call from Excel, and I noticed the LabWindows
DLL would call the runtime DLL (CVIRT.DLL). So maybe you must add the
runtime lib in some way to your MFC project?
Hans D. Jensen
"Bo Bai" wrote in message
news:[email protected]..
>
> I want to create a DLL in CVI and use the DLL in MFC. But even if I tried
> many ways, I cannot reach the objective. There are always link errors.
Could
> you give me some instructions about it?

How can I create a Teststand (1.0.3 or 2.0) distribution without having all of the VIs (6.0.2 or 6.1) in the same directory?

How would I create a Teststand distribution of LabVIEW VIs and maintain the test VI directory structure that I want?
I know that I have to use the application builder to build the custom operator interface, configure it as an ActiveX server, and launch the Teststand engine installation.
The only problem that I have is using the VI packager which puts all of the test code and sequences in a single directory.
This gets quite messy. There are just over 1000 files in the neatly orgainzed directory structure that I have now. (this includes support files, dll's and such)
I have read brief appnotes on configuring the ini file(s) to use
the vi search path that I want, but have not been able to get this to work. Maybe I'm not updating the correct ini? or have to include each subdirectory?
I have currently upgraded from LabVIEW 6.0.2 to 6.1
I am currently using Teststand 1.0.3
I have not upgraded to Teststand 2.0 yet because I have not decided if I want to build at this revision or go through the extra work to mass compile Teststand at LabVIEW 6.1, install the LabVIEW 6i VI Packager Fix, and update the new Teststand LV operator interface with my changes.
At present, I'm not getting the results I want and am quickly running out of time. I have to deliver the project by the 14th of July 2002.
Sorry for the long question and thanks for you help.

Hi,
I dont think the problem is really related to using the VI Packager but more to how the OI interface applications relates to labVIEW File constants.
If you are using the LabVIEW as the ActiveX Server then there should be no problems. But if you are using the Runtime LabVIEW server such as 'TestStandLVRTS' then the file constant would return different paths.
eg for the Default Path you would get 'C:\TestStand\Components\User\RuntimeServers\LabVIEW' instead of 'c:\Program Files\National Instruments\LabVIEW'.
Attacted is an example to show how to change these paths when using your runtime server. Unzip this into your teststand examples folder
Put the INI file in the location of the \user\runtimeservers\labview folder.
Change the labview adapter t
o use TestStandLVRTS.exe. You can run the example sequence from either the OI or seqeditor.
I hope this helps
Regards
Ray Farmer
Regards
Ray Farmer
Attachments:
UsingLVOI.zip ‏20 KB

How can I calling LabView DLL within LabView and pass similar Data Types?

I am trying to use an Instrument Driver, which is created in LabView6.1 as a DLL. At this point I have only LabView to test this DLL. I was wondering, is there easy way to find out what sort of Parameter or Data Type I should be using.
How can I pass the following data with in LabView:
LVRefnum as Type?
LVBoolean as Type?
TD1 (a structure) as Type?
It is funny to see that I am able to create a DLL in labview but having trouble calling it within LabView. I thought, it would be easier to test the DLL within the same environment.
Basically, I am more worried about the VISA calls that are used in the driver to communicate with instrument. Because, there is no link to �VISA32.dll� in
the header file, is that handled by the LV Run-time engine? I guess more details are needed on using the LabView DLL within LabView from National Instrument Technical Support.
Attachments:
RL5000.h ‏1 KB

A LVRefNum seems to be an unsigned long data type (32bit). You can cast it
in LV then use that as a parameter to call the DLL. (an Occurrence type
seems to be a Ulong32)
When you created the DLL what was the resulting type for the LVRefNum?
Happy Holidays
"Enrique" wrote in message
news:[email protected]..
> I see...
>
> After doing some research, it seems to me that there is no easy way to
> find out the type of data, other than looking at the header file and
> have documents like Using External Code in LabVIEW handy. The
> following information is from that document:
>
> LVBoolean is an 8-bit integer. 1 if TRUE, 0 if FALSE.
>
> LabVIEW specifies file refnums using t
he LVRefNum data type, the
> exact structure of which is private to the file manager. To pass
> references to open files into or out of a CIN, convert file refnums to
> file descriptors, and convert file descriptors to file refnums using
> the functions described in Chapter 6, Function Descriptions.
>
> I know you are creating a dll in LabVIEW, but I am pretty sure the
> information applies as well and is useful. For your dll this can be
> interpreted that, rather than passing a LVRefnum, try passing the file
> descriptor.
>
> From the header file, is can be deduced that TD1 is a cluster in
> LabVIEW.
>
> You are right in saying that "more details are needed on using the
> LabView DLL within LabView from National Instrument Technical
> Support.".
>
> Enrique

How to call a labview dll from excel-VBA?

How to call a simple Labview DLL from Excel VBA?
I have seen examples of DLL calls from VB but does it work the same way for VBA? I have 2000 excel and Labview 8.5. I created the DLL and tried to call it from VBA using the same type of code as in NI's website example(ofcourse its a bit diff with 8.5)
http://zone.ni.com/devzone/cda/tut/p/id/...
BUT it errors out when called from excel
ERROR: The object invoked has disconnected from its client

You would need to provide more details about the LabVIEW DLL, such as the prototypes of the functions (VIs) that you're trying to call, and your actual VBA code. Specifically, what object you're trying to create. You should also make sure the Run-Time Enginer is installed, as well as any required libraries such as the VISA Run-Time if you're using VISA. Have you made sure to enable the ActiveX server for the DLL?
A search yielded the following items that you may wish to peruse:
http://forums.ni.com/ni/board/message?board.id=170&message.id=261345&requireLogin=False
http://forums.ni.com/ni/board/message?board.id=170&message.id=45099&requireLogin=False
http://forums.ni.com/ni/board/message?board.id=170&message.id=299209&requireLogin=False
http://forums.ni.com/ni/board/message?board.id=170&message.id=195846&requireLogin=False

How do I create an executable with arguments that executes once and terminates

I'm just starting with LabView, so I'm sure this issue has been address somewhere already. I just can't locate the answer.
I am running version 6i (I may be able to get 7 or 8).
I need to create a command line executable program with parameter input that executes only once and then terminates.
This is for instrument control (sets the signal generator frequency, level, RF on/off and arms the Trigger). I have written a simple VI that works from within LabView (programs the instrument when the Run button is pressed). I have further managed to perform an Application Build to create an executable however, the application continues to run, waiting for the Run button to be pressed. Also, I need to know how to pass parameters to this executable (freq, level, RF on/off, trigger arm).
This executable will (eventually) be called repeatedly by a Matlab file.
Thanks,
D

LabVIEW 7 added a property to get a command line argument. For older versions see http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3DA5B56A4E034080020E74861.
I'm not sure I understand you problem with the Run button. If you set the execution mode to Run When Opened from VI Properties, it should execute once whenever it's called. I think that when building an executable, it changes the property to this if it's not already set. If the application does not have this set, it will not be running at all. I'm assuming that you are talking about the Run button on the toolbar and not a run Boolean that you've created on the front panel.
Since you have the app builder, your other option is to create a DLL. If you can call a DLL in Matlab, then that would probably be simpler.
Message Edited by Dennis Knutson on 11-28-2005 02:46 PM

How do I create a .dll?

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