what are refnum controls.what are there applictions. is there any tutorial on refnum controls.

[Prabhjit]

control forum

[altenbach]

Refnums have many applications, e.g. if you open a file, you'll get a refnum. Same for a TCP connection, VI reference, control reference, etc. etc. So, why do we need controls for them?

Yes, we typically don't in the toplevel program! However, if you need to feed a refnum created in the toplevel VI to a subVI, a refnum control provides a way to create a connector for it on the subVI front panel. 🙂

Message Edited by altenbach on 07-18-2005 12:37 AM

[Megan B.]

Great answer altenbach!

Prabhjit, you may want to check out this link to an Overview of Control References: http://zone.ni.com/devzone/conceptd.nsf/webmain/68d318643afa3ca086256928006c64a4#5

Good luck!
Megan B.
National Instruments