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Cocoa: programmatically display the main window after closing it with X

I want to programmatically reopen the main Cocoa application window after the user closed it with the X button. I know this is still somewhere in memory, but I don't know where.

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If you use the default Cocoa application template, your application delegate has a link to a window located in MainMenu.xib. You can just call

[window makeKeyAndOrderFront:self];

possibly in the IBActionmenu item invoked to reopen the window. Note: make sure that the “Release at close” and “Single snapshot” checkboxes are not checked in IB.

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