一个dib类 支持位图文件的装载 存储，能返回位图文件的高宽颜色数目颜色表首地址图像信息借口首地址图像数据首地址-The high wide number of colors in the color table image data of the first address, the first address of the image information an excuse address a dib loading storage class support for bitmap file can return the bitmap file