用普通方法显示BMP位图，占内存大，速度慢，在图形缩小时，失真严重,在低颜色位数的设备上显示高颜色位数的图形图形时失真大。本文采用视频函数显示BMP位图，可以消除以上的缺点。-With an ordinary method to display bitmap BMP, total memory, slow, narrow in the graphic, the distortion is severe in low color bit high color depth displayed on the device s large graphic graphics distortion. In this paper, the video function display BMP bitmap, you can eliminate the above shortcomings.