Topic: how to know if a command exists

[TopoWAR]

good friends, here asking for your help, how can we know if there is a command in autocad, using lisp, for example: _MAP2SDF, as we all know there are commands that are only civil, thanks



I tried to use this method but it returns T, I want something that returns nil if the command does not exist, it seems that this difficult right
(vl-cmdf "_test")

[Grrr1337]

hints:
vl-some
atoms-family

[TopoWAR]

Grrr1337,  this code has an error   

[BIGAL]

it was a HINT

(atoms-family 1)

[Marc'Antonio Alessi]

(Getcname "foo")

Edit:
Retrieves the localized or English name of an AutoCAD command  Supported Platforms: Windows and Mac OS Signature (getcname cname)

cname Type: String

The localized or underscored English command name; must be 64 characters or less in length.

Return Values
If cname is not preceded by an underscore (assumed to be the localized command name), getcname returns the underscored English command name. If cname is preceded by an underscore, getcname returns the localized command name. This function returns nil if cname is not a valid command name.

Examples
In a French version of AutoCAD, the following is True.

(getcname "ETIRER")
"_STRETCH"
 
(getcname "_STRETCH")
"ETIRER"