graphical user interface Meaning and Definition
Object reference not set to an instance of an object.
Object reference not set to an instance of an object.
graphical
user
interface
In computer science, a graphical user interface (GUI /ɡuːiː/), is a type of user interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, instead of text-based user interfaces, typed command labels or text navigation.

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