How can I change the default value of a command ?

I want to be able to change the default value of a comand when the vi
is running. (I know how to do that with a right click when the vi is
not running).
In fact I would like the user of the vi to be able to choose a new default value for a command.
How can I do that ?

You can't do this on a running VI. If you have an idle VI, you can open a reference to that VI and use an invoke node with the Make Current Values Default method, but that will only work in LV (i.e. not in an EXE) and will affect all the controls. What you can do is save the values to a file and load them when the program starts. OpenG's File I/O package includes some VIs which will help you with that.
Try to take over the world!

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