I did an executable from the VI enclosed...I made the event "front panel closed ?" in order to hide the executable (like a ghost)
The problem: when the executable is hidden and then I click on its icon in order to display it: it's not working I put a "Maximzed" state but it doesn't work as well...
What exactly are you trying to accomplish? Your VI doesn't make a whole lot of sense. You're discarding the panel close in order to hide the front panel. Once it's hidden it's.. well, hidden. I would think you would want to minimize it. As I said, please explain what you're trying to do.
Once the VI is hidden it loses focus from the OS. Therefore you need some other mechanism to trigger the VI to reopen its front panel. A simple way to do this is to have the VI monitor the keyboard, and if it sees a certain key combination, it will resize itself. For example: