How set values to LABview controls from C++ ?

[Pierre_a]

We need a way to command a LABview program from a C++ program :
- Send controls to the LABview program and start it
- Get some strings data from the LABview program.
Could you help us ?
Thank you.

[John Lum]

If you're on Windows, then you could do this pretty readily with ActiveX. There's a nice example in the NI Developer Zone called "Calling LabVIEW from Visual C++". The advantage is that it's neat, with all message-passing happening under the hood in the OS.

If you want something OS-generic, then you might consider using file I/O or TCP/IP to pass information between applications.

For instance, you could write a LabVIEW program that looked for text (data from your C++ routine) to appear in a certain file, or waited for that data to appear on a certain TCP port. The program could do its thing and then pass info back to the C++ routine in the same manner.

Best Regards,
John Lum
National Instruments