[DUG] Compnent creation question

[Robert martin]

Sounds likely.  I am calling it BEFORE inherited destroy.



Paul Heinz wrote:
> Rob asked: 
>
>   
>> Same error. 
>>
>> Further info.  The error is now showing 'Control 'CB' has no parent'  
>> where CB is the name of the combobox.  manually freeing the combobox 
>> using a button and a .free works perfectly (all objects are 
>> freed and no 
>> erros).
>>     
>
> At a guess, from memory, I think the Combo Items are managed a TStrings
> wrapper class which synchronises with the internal items list of the
> Micrsoft COMBO control builtin.
>
> So, the TStrings layer is sending delete notifications, and it might be
> attempting to send the necessary Window messages to the backing COMBO.
>
> But, since the TCombo box is currently a partially destroyed zombie
> control, it might end up causing Delphi to attempt to recreate it (i.e.
> to get a window Handle for the message)
>
> In the process of recreating the zombie, it might thus complains about
> missing Parents, which is a Window handle related concern.
>
> Now, this is all just a grand theory 
> (well, hypothesis to be pedantic i.e. I pulled it out of my ...)
>
> So are you calling your new code _before_ or _after_ the call to the
> inherited in the destructor?
>
> TTFN,
>   Paul.
>
>
>
>
>
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