一个纯PB做的串口通信的例子，调用API，占用系统资源少。-PB to do a pure example of serial communication, call API, occupy less system resources.

PB设置菜单的背景色 //使用API函数LoadImage()调入BITMAP图像 ls_BitMapFileName = Pic2.Bmp ll_hBitMap = LoadImage(0, ls_BitMapFileName, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE) //创建位图刷子 ll_BitMapBrush = CreatePatternBrush(ll_hBitmap) //设置MENUINFO结构 lstr_M