在VB的图形窗口中平滑滚动地图，源码运行没有闪烁-in VB graphics window smoothing rolling map source operating without blinking

利用兼容DC实现图形的保存和再现,实现内幕，滚动窗口的实现，坐标空间，映射方式，设备坐标与逻辑坐标的转换。-Use of compatible DC to achieve the preservation of the graph and reproducibility.Realization of the insider, the scrolling window, coordinate space mapping method, the device coordinates and logi

采用C++ 和OpenCV库设计画图窗口，RBG颜色可使用滚动条调整颜色。可用于电脑画图保存。(C++ and OpenCV libraries are used to design drawing Windows, and RBG colors can be used to adjust colors with scrollbars. It can be used for computer drawing.)