User interface libraries such as Windows Presentation Foundation , GTK+ , and Cocoa , contain a collection of controls and the logic to render these .
Controls are software components that a computer user interacts with through direct manipulation to read or edit information about an application .
User interface libraries such as Windows Presentation Foundation , GTK+ , and Cocoa , contain a collection of controls and the logic to render these .
Controls are software components that a computer user interacts with through direct manipulation to read or edit information about an application .