State management

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State Management refers to the management of the state of one or more user interface controls such as text fields, OK buttons, radio buttons, etc in a Graphical User Interface. In this user interface programming technique, the state of one UI control depends on the state of other UI controls. For example, a state managed UI control such as a button will be in the enabled state when input fields have valid input values and the button will be in the disabled state when the input fields are empty or have invalid values.