得到桌面dc，把桌面放到句柄HBITMAP中，并保存为my.bmp-Get Desktop dc, HBITMAP handle to the desktop in place, and saved as my.bmp

将图形文件保存到access数据库中，可以读取，保存，显示，支持bmp，gif，jpg等格式文件-The graphic file to access the database, you can read, save, display, support bmp, gif, jpg and other formats