The functionality provided by GUIKit has been superseded by the interface construction and controls functions native to the built-in Wolfram Language.
- To use ReleaseGUIObject, you first need to load GUIKit using Needs["GUIKit`"].
- ReleaseGUIObject programmatically ends an interface's session (which is normally ended interactively by user actions such as closing the window), both closing and disposing of all related resources.
- ReleaseGUIObject forces the termination of interface resources even if an initial GUIRun might have requested that the interface live on past its closing by using the option ReleaseMethod->Manual.
- Use CloseGUIObject instead of ReleaseGUIObject to ensure the original life cycle intent of a GUIRun call.