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How To Determine Variable Existance
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Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
00249743
Message ID:
00249753
Vues:
24
>I would like to know if it is possible to test for the existance of a variable. I need to do this because the fact that a particular variable does or does not exist provides information I need for processing. Of course, if I test the value of a non-existant global variable, I get an error msg. If this is possible, I would like to know the command, syntax, etc.
>
>Thanks.

Mark,
IF TYPE("VariableName") <> "U"
   * It exists
ELSE
   * It doesn;t exist
ENDIF
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