VC++实现文件拖拽的代码(文件拖放)，分四个步骤实现文件拖拽打开，拖放获取文件路径，打开实例窗口后，拖动任意一个文件到窗口中，可获该文件的路径信息，为下一步拖放打开文件提供方便。-After the VC++ code file drag (drag and drop files), drag and drop files to open, drag and drop access to the file path is divided into four steps, open instance of the window, drag any file to the window, may be the file path information , for the next drop open file.