一份完整的通过USB端口通讯的可控单喷头应用文档，主要内容是用C++开发一个OCX控件，可以接收字符串和控制命令，转换为位图后传送给硬件喷印，付有详细说明文件。-Through the USB port of a complete single-nozzle application of the controllable communications documents, the main content is to develop a C++ OCX control that can rece