说明：  纯C编写的BMP文件操作，包括读图和写数据至图片。程序鲁棒性好！本人亲自编写，是视屏采集中的中间接口函数，特地奉献。
(BMP files written in pure C operations, including interpret drawings and writing data to the picture. Robust procedures for good! I personally prepared, is collected in the middle of Shiping interface functions, specifically dedication.)