>>
>>An object will not be released as long as at least one reference to it exists. Storing reference to the parameter object in a property of the child form guaranteed that it'll be available as long as form exists.
>
>On testing, that seems to be true. However, I for one have never relied on that feature, I haven't seen it documented anywhere. You can end up with code that does not act as "expected", but throws no errors:

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I'm not sure how you are using VFP in the first place because half of the features are not documented :)

Anyway check http://www.foxpert.com/knowlbits_200908_3.htm