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CAD tip CAD tip # 4170:

   
Question CAD 
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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).
ACAD
100% *  CAD 
17.12.2004    10800×  
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applies to: AutoCAD ·

See also:
Tip 12926:How to import point coordinates from Excel to AutoCAD?
Tip 12914:Geo2GPS - web map from any coordinate of an AutoCAD DWG.
Tip 12837:RenameCSV - rename layers, blocks, layouts, views, linetypes using Excel tables
Tip 12830:Converting pseudo-tables consisting of lines and texts to TABLE objects in AutoCAD DWGs.
Tip 12796:How to reorder custom DWG properties?


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