VI start/end events?

[Gordal]

I have an application in which i need to execute some events when the main vi is open/closed (closed as in the user clicks the top right corner 'x'). Is there any event i can use for this? 

Message Edited by Gordal on 05-18-2010 03:05 PM

[PhillipBrooks · Accepted solution]

You would use the <Application> Application Instance Close? and/or the <This VI> Panel Close? filter events.

Jim Kring has a nice blog entry on this subject:

Controlling the Exit of Built Applications

[Gordal]

Are there similar ways to do this in non-built applications? When developing.

[tbob]

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Gordal wrote:
Are there similar ways to do this in non-built applications? When developing.

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Yes.  Select <This VI> instead of <Application> when adding a new event.  Some sub-selections for This VI are:  Key, Mouse, Menu, Panel Close, Panel Resize.  Select Panel Close to capture when someone clicks on the X in the upper right corner of the front panel.  You can use Panel Close? to trap the event and wire a True to the discard terminal to prevent the user from closing the panel with the X.

You can also use <Application> - Application Instance Close? to trap when a user clicks on File - Exit.

Message Edited by tbob on 05-18-2010 01:55 PM

[falkpl]

Does it have to be event based?

it coulb be as simple as a state machine architecture

Startup State->Main Code->Shutdown State

[PhillipBrooks]

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falkpl wrote:

Does it have to be event based?

it coulb be as simple as a state machine architecture

Startup State->Main Code->Shutdown State

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Based on the original poster's question, yes.

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 (closed as in the user clicks the top right corner 'x').

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A state machine by itself can't capture events such as the application close, you need to use the event structure.