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23/02/2010 09:39:35
General information
Forum:
Visual FoxPro
Category:
Other
Environment versions
Visual FoxPro:
VFP 9 SP1
Miscellaneous
Thread ID:
01450463
Message ID:
01450479
Views:
43
>>>>>>Hi,
>>>>>>
>>>>>>I dropped an object (class) on a form. Then in the form LOAD method I check if this object is NULL as following:
>>>>>>
>>>>>>isnull( thisform.MyObject )     && Returns .F.
>>>>>>type( "thisform.MyObject" )   &&  Returns "O"
>>>>>>
>>>>>>
>>>>>>So I presumed that the object is instantiated in the LOAD method of the form. But when I call a method of this object in LOAD method of the form, I get error that the object does not exist. Does it mean that the object is fully instantiated only in the INIT method of the form?
>>>>>
>>>>>Yes
>>>>>
>>>>>But you can add the object in the load() of the form prior to using it
>>>>
>>>>You mean by instantiating the object as the following?
>>>>
>>>>thisform.MyObject = newobj("MyObjectClass","ClassLib")
>>>>
>>>
>>>
>>>yes - or -
>>>
>>>this.NewObject('MyObject', "MyObjectClass", "ClassLib")
>>>
>>
>>Thank you, Gregory.
>
> >This is what I will have to do. The only downside of this method (not a big deal though) is that I have to set all properties in code, instead of visually.
>
>Welcome to the .net world ..
>
>>Also, I have to set the object to NULL in the UNLOAD whereas if you drop the object it is destroyed automatically.
>
>No, you don't need to. All objects are destroyed automatically

Thanks. I understand. And Sergey's message explains it.
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
"My experience is that as soon as people are old enough to know better, they don't know anything at all." Oscar Wilde
"If a nation values anything more than freedom, it will lose its freedom; and the irony of it is that if it is comfort or money that it values more, it will lose that too." W.Somerset Maugham
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