We have a EXT-GWT web application that runs in IE and uses an IFrame to embed an ActiveX Control. In the outer frame, the app creates an EXT Window object and sets the window as modal using the setModel(true) method. The window is shown as a lightbox over the application, but the ActiveX Control in the IFrame disappears. I found the following thread in the forums that discusses a verify similar problem using EXT-JS to mask an area that contains an ActiveX Control: http://www.sencha.com/forum/showthread.php?68270-mask-and-active-X-control. Is there a similar workaround for EXT-GWT Window object that would allow the ActiveX Control to remain visible and operable even though the rest of the app is disable with the lightbox?