If you know lisp language, you can write and save it according to your own needs. When you use it, you can load the application into the tool and then you can use it. Add a line of program name to make it automatically load when cad is started.
Many cad viruses also take advantage of this. As long as you don't download lsp files and load them online, it's generally no problem to use your own.
Extended data:
Acad.lsp is a Lisp script file of AutoCAD software. When AutoCAD drawing dwg file is opened, the script file named acad.lsp in the same folder will automatically run, which makes acad.lsp file a way for computer viruses to spread between computers with AutoCAD software.
poisoning symptom
Poisoning characteristics: the file acad.lsp will be automatically generated in the folder where AutoCAD drawings are located.
Virus harm: There are many kinds of CAD viruses spread through the acad.lsp file, so the symptoms are different, but they are often reflected in the abnormality of some functions in AutoCAD software. The main phenomena are: filling in the blank is not displayed, the size arrow is hollow, the middle mouse button can't pan the view, the move command becomes copy, the decomposition command is invalid and so on.
Baidu encyclopedia -acad.lsp
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