Hello,
I am looking for a way to count the length of multiple lines/Plines/Arcs to one lenght. is there a command for, or a lisp?  
 
It would be nice when it's possible that the lengths are in a dynamic way...
 
I know it is possible with eattext, but is there also an command for in autocad??
 
regards,

You can use the AddLen utility - see Download, or perhaps the DATAEXTRACTION command.