High Quality Content by WIKIPEDIA articles! Dialog Control Language (DCL) is a high-level description language and interpreter within AutoCAD for creating simple graphical dialogs. AutoLISP extensions use it to interact with the user in the AutoCAD environment. Unlike other major GUI APIs, DCL is not a complete GUI toolkit for application programming. It is only intended for providing simple dialogs within AutoCAD. It includes basic form widgets such as text boxes, buttons, checkboxes and list boxes. DCL is object-oriented; it allows re-use through inheritance and composition. DCL syntax is based on defining and using 'tiles'. A 'tile' represents a GUI widget such as a text box or a text label. Tiles also represent widgets that hold other widgets, such as columns, radio button groups and the dialogs themselves. DCL provides built-in tiles for all major widgets, and new tiles can be defined through inheritance and composition of other tiles.

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