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CAD tip CAD tip # 4170:

   
Question CAD 
 %  platform  category 
Q - question

What is the difference between the (command) and (vl-cmdf) LISP functions?
A - answer These AutoCAD-command-invoking functions are almost identical. The newer (vl-cmdf) VisualLISP function verifies the parameters passed to AutoCAD and invokes the command only if the arguments are valid.

Compare e.g.:

(setq p (getpoint))
(vl-cmdf "_ID" p)
(vl-cmdf "_ID" "dummy")
(command "_ID" "dummy")
(vl-cmdf) returns T if the command was invoked successfully (nil otherwise).
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17.12.2004    12403×  
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