private synchronized void aquireSystemWindow()
{
if ( !bPeer )
{
// set real parent
XVclWindowPeer xVclWindowPeer = (XVclWindowPeer)UnoRuntime.queryInterface(
XVclWindowPeer.class, mWindow);
xVclWindowPeer.setProperty( "PluginParent", getWrappedWindowHandle());
bPeer = true;
// show document window
XWindow aWindow = (XWindow)UnoRuntime.queryInterface(XWindow.class, mWindow);
aWindow.setVisible( true );
}