Development notes: The demo development platform is Windows 2000 Profession Resolution: 640*480; Memory: 128M The development software is: Borland C++ Builder 5.0 Enterprise Edition, which uses the third-party control package DreamControl (text preview editing function) 1. The database uses Access97 (data.mdb), which is converted into a flat database (data.cds) in Bcb to record the attributes of each object, which can be easily modified and updated. 2. The main view is divided into four parts: tool area, view area, property area and editing area. The four parts are linked to each other. 3. When it comes to moving objects with the mouse, problems arise and are not resolved. 4. I can’t do it anymore, I have no time, I have to stop, Sorry.