图形设备接口（GDI，Graphics Device Interface）的主要目标之一是支持在输出设备（如视频显示器、打印机和绘图仪）上的与设备无关的图形。 GDI通过将应用程序与不同输出设备特性相隔离，使Windows应用程序能够毫无问题地在Windows支持的任何图形输出设备上运行。-Graphics Device Interface [GDI, Graphics Device Interface] one of the main objectives are to support the output device [such as video monitors, printers and plotter] on the device-independent graphics. GDI by applications with different output device characteristics of isolation, so that Windows applications can without any problem in the Windows support any graphics output devices.