GUIObjectQ

GUIObjectQ[ref]
returns True if ref is an active GUIObject and otherwise returns False.

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Basic Examples  (1)Basic Examples  (1)

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Create a GUIObject instance and assign it to a variable:

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With the interface still running, test whether the variable references an active GUIObject:

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Force the interface to terminate and release its resources:

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Test whether the variable still references an active GUIObject:

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