Using DLL for product NI USB - 6501 in VB

[1148947077]

HI,

I'm developing an application in VB6 to control a NI USb - 6501 device. I follow all example that I found in  the NI website but with no success.

My problem is that I can't use a dll to reference in VB6.

I had follow the steps and example in https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019MiWSAU&l=en-US and another example that show how I must proceed to create a wrap dll. My problem always is the same, i get error that show to me that the dll can't be found. I already copy to the system32 folder...

Attached, the last example that I follow. I appreciate if somebody could help me.

[Abel_Souza]

Hello,

      When you install NI-DAQmx driver you place a checkmark to install VB support? If not, you will need run NI-DAQmx installer and install VB support.

Best regards,

Abel Souza

Applications Engineering

NI Brazil

[1148947077]

Hi Abel,

Tks for support me. Yes, I enabled the Vb Support. I Can't understand why the program can't find the dll, I know that all these DLL are based in C, and I can't registry then use the command "regvsvr32". Did you check the source code attached, maybe you can take a look in .bas file, that make the reference to the dll.

Best Regards,

[Abel_Souza]

I saw you are using DAQmx Base, but to use your board with VB you need use NI-DAQmx, they are differnt drivers.

https://www.ni.com/en/support/downloads/drivers/download.ni-daq-mx.html

Regards,

Abel Souza

[1148947077]

Hi Abel,

Tjs again for support me. I Download the program and installed in my PC. But, I'm still getting the same error.... "File not found" see picture attached. 

Can you help pls?

[nyc_(is_out_of_here)]

Try rebooting your PC after a software install.

Also do a search for that file.

[1148947077]

Hi Abel,

Yeah, I already reboot my PC ... I can see the file in my system32 folder. 

Attached the picture from  my system32 and the dll there.

[Abel_Souza]

I saw in your picture the DLL is from DAQmxBase and not from DAQmx. I suspect you are using a function from DAQmxBAse in place of functions DAQmx.

I suggest you go to Start>>All Programs>>National Instruments>>NI-DAQ>>Text Language Support and run a VB code example and check if you receive the same error.

Best regards,

Abel Souza

[1148947077]

Hi Abel,

I'd like to use the dll for Measurement Studio, I think this is similar than use an API. And in the example just have using anoter dll "Nidaq32.dll".

I want to develop my application following the example: http://www.ni.com/swf/demos/us/mstudio/vb6daq/default.htm 

But, as I describbed my program report that can't find de DLL. If you had some example, I appreciate.

Best Regards

[Abel_Souza]

What is your measurement studio version?