detect window destruction

[M.Schrijver at el.utwente.nl]

If you wrote your own windows-procedure, you should check for the
WM_CLOSE, or WM_DESTROY messages. You should use the first for e.g.
asking the user if he/she wants to save any data, and the second to free
memory and other resources etc. Normally, both messages are generated
when a user closes a window, in the indicated order.

ir. Marc Schrijver
Faculty of Electrical Engineering (S&S NT)
University of Twente
The Netherlands

> ----------
> From: 	Daphne Yu[SMTP:dyu at bme.jhu.edu]
> Sent: 	Friday, October 29, 1999 1:52 PM
> To: 	vtkusers at gsao.med.ge.com
> Subject: 	detect window destruction 
> 
> 
> 
> 
> hi vtk users,
> 
> i'm wondering what's the best way to detect if a user has closed
> a rendering or image window through the window manager?  i don't
> seem to see an explicit way to check this.  i'm using windows nt
> and c++ with vtk2.4 library.
> 
> tia,
> daphne
> 
> 
> 
> 
> 
> 
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