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To release a form is NULL ok or need to Release()?
Message
 
 
À
11/03/2012 09:54:19
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Versions des environnements
Visual FoxPro:
VFP 9 SP1
Divers
Thread ID:
01537966
Message ID:
01537974
Vues:
33
>>Hi,
>>
>>I have a procedure/function in my application that closes (I suppose) releases all open forms. The procedure sets the variable that references the open form to NULL. Now I got to think about if this is the right approach. Is it better to call the Release() method? Here is the segment of my code:
>>
>>
>>Function CloseForm
>>lparameter tcFormName
>>
>>*-- Find this form in the array of all currently open forms
>>FOR nRow = 1 to alen( aAppForms, 1 )  
>>
>>    *--- Found the element/row of the array matching search criteria!
>>    IF aAppForms[nRow,3] = tcFormName
>>        *-- Column 5 of the array stores the reference to the open form
>>        aAppForms[nRow,5] = NULL
>>       EXIT 
>>    ENDIF 
>>
>>NEXT 
>>
>>
>>Is it better to change the above aAppForms[nRow,5] = NULL with aAppForms[nRow,5].release()?
>
>
>Setting the refernce to null will not close the form ( if started with DO FORM ...)
>
>Best is to use
>
>= m. aAppForms[nRow,5].release()
>
>
>After that, provided the queryUnload() returns true, aAppForms[nRow,5] and all other places that hold a reference to that form, will be null

One thing in the above is a little confusing. When I call .Release() of a form object, the QueryUnload() is not fired. This is how I thought it always worked; that is, the QueryUnload() only fires when you close the form by clicking on the X in the upper right side of the window. Did you mean to say Unload instead of QueryUnload?
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