How do I dynamically open a VI and load values into its connector pane?

[Nasgul]

I'm trying to open a VI as a prompt to another VI without opening the second VI's front panel until the user clicks OK in the first window. The second VI takes inputs from the first thru its connector pane. How do I dynamically open the second VI?

[J.DECHET]

Use the VI invoke node 'FrontPanel\Open' to open dynamically a VI.

[ASTDan]

I think what you mean is call by reference dynamically loading VI's

You can read up on it here

If you want to make a static call to the sub vi just set the  Front Panel Options to "Open Front Panel when called"

See here for more info

Hope that answers your question