delphi 编写的云镜控制支持PELCO P/D协议的DLL。 支持对云台镜头及辅助开关的操作。直接封装了SPCOM类，调用只需输入COM口号及对应的命令字符及可。-delphi prepared by the Mirror-control support PELCO P / D agreement DLL. Yuntai support for the camera and auxiliary switch operation. Packaging a direct SPCOM cate