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* How do very basic vcl widgets get peers:

    + toolkit/awt/ VCLXToolkit::ImplCreateWindow
	+ calls GetComponentInterface (sal_True) - if no comp. iface.

    + vcl's Window:
    virtual ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindowPeer > GetComponentInterface( BOOL bCreate = TRUE );

    + vcl/inc/vcl/unowrap.hxx:
	// Window
	virtual ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindowPeer> GetWindowInterface( Window* pWindow, sal_Bool bCreate ) = 0;
	virtual void				SetWindowInterface( Window* pWindow, ::com::sun::star::uno::Reference< ::com::sun::star::awt::XWindowPeer > xIFace ) = 0;

    + from svapp.cxx Application::SetUnoWrapper
	-> toolkit/awt 'ToolkitWorkerFunction' ( extern C / dlopen linkage )

    + from toolkit/source/helper/unowrapper.cxx:
	-> CreateXWindow -> 'return new VCLXWindow' 
	    ** FIXME: we need love in here too:
		+ METRICBOX eg.