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Article View: borland.public.cppbuilder.nativeapi
Article #3643

Re: Using a window handle

#3643
From: Malcolm Smith
Date: Wed, 10 May 2006 21:19
65 lines
3032 bytes
Remy,

The HWND is coming into my DLL from the Cleanup Manager, not going out.

HRESULT STDMETHODCALLTYPE TDevCleanCtrlImpl::ShowProperties(HWND hwnd)
{
// we are caching the form in case the user shows it more than once
if( !frmFileDetails )
  frmFileDetails = new TfrmFileDetails( NULL, FVolume, FFileSearch, 
FFileStates );

if( frmFileDetails )
  frmFileDetails->ShowModal();

return S_OK;
}

So how do I use the HWND in my form to tell it that the Cleanup Manager is 
the parent form ?

I tried setting Application->Handle but that didn't make any difference.

-- 
Malcolm Smith
MJ Freelancing
http://www.mjfreelancing.com

Associate Editor
C++Builder Developers Journal
http://www.bcbjournal.com

"Remy Lebeau (TeamB)" <no.spam@no.spam.com> wrote in message 
news:44621e0c$1@newsgroups.borland.com...
>
> "Malcolm Smith" <mjfreelancing@optusnet.com.au> wrote in message
> news:4461e528@newsgroups.borland.com...
>
>> I cannot work out how to make use of the hwnd parameter correctly.
>
> According to the documentation:
>
>    IEmptyVolumeCache::ShowProperties Method
>
> http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/reference/ifaces/iemptyvolumecache/showproperties.asp
>
>    hwnd
>    [in] Parent window to be used when displaying the UI.
>
>
> Did you try passing in the Handle of your form as the parent window?
>
>> For example, if a user minimizes my form (which is currently modal) I'm
>> not sure how to make the calling (microsoft) window also minimize.
>
> It should minimize automatically if the window that ShowProperties()
> displays is a child of your form's window.
>
>> And, if a user restores either form to make sure they both restore.
>
> Child windows are automatically shown when their parent window is shown.
>
>
> Gambit
>
> 
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Subject: Re: Using a window handle
Date: Thu, 11 May 2006 07:19:53 +1000
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