BMP 文件是一种常用的图像文件格式，本文的例子程序产生一个简单的 640x480 24 bit 颜色的 BMP 文件。BMP 文件的格式分两部分，第一部分为文件头，具体定义见源程序，第二部分为数据区，紧接着文件头存放。

-BMP file is a common image file formats, sample programs in this article produces a simple 640x480 24 bit color BMP file. BMP file format in two parts, the first part of the file header, specifically defined in the source code, and the second part is the data area, followed by the header storage.