Not much info here.
Does the C program run continuously in parallel with Labview or is it
called, does its job and then stops until the next call?
Do you have the source code?
There are so many ways this could be achieved that it's pointless discussing
it on the basis of such a vague message.
Felix wrote in message
news:3a530f36@newsgroups.ni.com...
>
> I wonder how a labview program could
> communicate with a C-program. In
> particular I want to pass a variable-value to the C-program.
> Thanks for your help.
>