DIB设备无关位图文件，这是一种文件格式，是为了保证用某个应用程序创建的位图图形可以被其它应用程序装载或显示一样。 DIB的与设备无关性主要体现在以下两个方面：DIB的颜色模式与设备无关。例如，一个256色的DIB即可以在真彩色显示模式下使用，也可以在16色模式下使用-DIB device-independent bitmap file, which is a file format, is to ensure that bitmap graphics created with an application that can be loaded by other applications or display the same. DIB has nothing to do with the equipment is mainly reflected in the following two aspects: unrelated DIB color mode with the device. For example, a 256-color DIB is in true color display mode can also be used in 16-color mode