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Event for VI.

Generated when the user tries to interactively close the front panel of a VI by selecting the Close item in the File menu or by clicking the close glyph on the window border. The Panel Close event is a notify event.

If a user closes the front panel of a VI that is not being called as a subVI and does not have any open references, LabVIEW aborts the VI. To ensure a Panel Close event case executes completely, be sure the application opens a reference to the VI before a user can close the front panel.

Caution  Do not use the Panel Close notify event for important shutdown code unless you have taken steps to ensure that the VI does not abort when the panel closes. Alternatively, you can use the Panel Close? filter event, which occurs before the panel actually closes.

An event case configured to handle a notify event cannot affect if or how LabVIEW processes a user interaction. If you want to modify how LabVIEW processes a user interaction, use the Panel Close? filter event.

Note  LabVIEW cannot generate a Panel Close event for a VI being viewed or controlled remotely. If you are viewing or controlling a VI remotely, LabVIEW can generate events only for controls, not for a VI or the entire application.

Event Data Fields

Name	Description
Source	Source of the event. 0 LabVIEW UI 1 ActiveX 2 .NET 25 User Event n Other
Type	Type of event that occurred, such as Mouse Down, Value Change, Timeout, and so on.
Time	Value of the millisecond timer when the event occurred.
VIRef	Reference to the VI on which this event occurred.