NI-Spy and NI I/O Trace: How it work?

[HuyHoang]

Hi everyone,

I want to write a program that work similar to NI-Spy or NI I/O Trace using VBA

Could anyone explain me how they work? or which API should i use?

Thank you so much

[rleonard3]

Hi Huy,

I am not entirely sure how NI I/O Trace or NI Spy work but here is a document with the NI-VISA API that you can use to reference:

NI-VISATM Programmer Reference Manual

"http://www.ni.com/pdf/manuals/370132c.pdf" 

[HuyHoang]

Hi Rleonard3,

Have a nice day to you

Thank for your support me

But as my understanding, this reference manual is APIs to control equipment

What I need is how to capture APIs calls made by applications.

For examples when I send a command to instrument "Set sg_inst.IO = sg_mgr.Open("TCPIP0::192.168.0.18::INSTR")"

The problem will return me viOpenDefaultRM(xxxxxxxxxxxxx). Something like that

Thank you!

[Brian__P]

Hi Huy,

The API for NI IO-Trace is unfortunately for internal use only. What exactly are you trying to accomplish? Does IO-Trace not work for you?

Have a great day!

PoteetB

Applications Engineering

National Instruments

[HuyHoang]

Dear PoteetB,

Thank for kindly support me

Let's me explain my problem. Plz see the attachment as well

Now I want to write application 1 using VBA to control Signal generator

The application 1 is running parallel with application 2. Application 2 is fixed, can't modify, it comes from my supplier

When I run two application 1 & 2, it will make a crossing and stop all applications

But when I run NI I/O trace parallel with application 2, it works well and no crossing

I wonder how NI I/O trace works. I want to write application 1 similar to NI I/O trace

Whether having another way to make application 1?

Thank you, everyone!