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I implement a XToolbarControler. i have a XButton private field that i'm
setting inside the createItemWindow() method. for some reason when i
construct the xButton inside the createItemWindow()

      xButton  = (XButton) UnoRuntime.queryInterface(XButton.class,
d_xWinPeer);

and this method exits the xButton reference is null! why is that? and how to
fix it? 
probably b/c the d_xWinPeer reference is destroyed when the method exits?
that's why xButton reference turns to NULL?
it seems all the UI components that we set inside createItemWindow are set
to Null after this method exits. How can we keep a reference to the XWindow
returned by this method ? 
any help is much appreciated.


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