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Detect owner window.

mshaw
mshaw asked
on
Medium Priority
357 Views
Last Modified: 2013-11-23
I need to detect the handle of the window in which my component is placed.
Using the owner's handle is fine when the component is on a form in Delphi, but that doesnt work when its on an ActiveForm in a web browser.
Currently I use the windows API call GetActiveWindow, but I cannot rely on the web browser being the active window.
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If you have your control's handle, you could use:
  GetWindow(MyControl.Handle, GW_OWNER);

Cheers,
JB

Author

Commented:
Yes, I thought that would have worked, and have already tried that. It doesnt work when my component is an activex control in a web browser.
Strangely, the IsControl function returns false, both for my component and for the active form.
Mmm...  I presume you're using Delphi 3, so what does MyControl.ParentWindow return?

(The "IsControl" property affects property streaming at design-time.  I don't know how relevant it is to your situation???)

Author

Commented:
Yes, I'm using D3. It returns 0.

The whole reason I'm trying to get the handle of the window is to change the window procedure for that window so that my component can detect when that window is being moved. It works when its a VCL and ActiveX component in a D3 form, but not when its in a web browser.
Commented:
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Commented:
Sorry, dependant on the object scope the code will not compile. Take this :

AHandle := Self.Handle;
while Windows.GetParent(AHandle) <> 0
 do AHandle := Windows.GetParent(AHandle)
// now AHandle is the top parent window

Slash/d003303

Author

Commented:
Slash,
well done. It worked a treat.
Mark.
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