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Prevent duplicate open forms
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De
07/02/1997 20:14:23
 
 
À
07/02/1997 20:09:30
Information générale
Forum:
Visual FoxPro
Catégorie:
Gestionnaire d'écran & Écrans
Divers
Thread ID:
00019652
Message ID:
00019659
Vues:
42
>>hi,
>>how do I test if a form is already open (not
>>necessarily active) before I DO FORM ""?
>>
>>I only want one instance of any form
>>Thanks
>>John Morga
>>Jmorga@spec.net
>
>You can use this syntax:
>
>DO FORM yourformscxname NAME yourformassociatedname
>
>From the menu, you can skip for TYPE('yourformassociatedname')='O' AND NOT NULL('yourformassociatedname').
>
>I am not sure about the NULL syntax. You might want to verify that from the help.

ISNULL()

Vlad
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