Understanding the Graphics Object

The code within the Windows operating system that handles drawing everything to the screen, including text, lines, and shapes, is called the Graphics Device Interface (GDI). The GDI processes all drawing instructions from applications as well as from Windows itself and generates the proper output for the current display. Because the GDI generates what you see onscreen, it has the responsibility of dealing with the particular display driver installed on the computer and the settings of the driver, such as resolution and color depth. This means that applications don't have to worry about these details; you write ...

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