I have created an ATL control which also hosts a WebBrowser control. I have hooked up IDocHostUIHandler, etc and everything seems to be working fine. When I display a web page that has animations, or refresh the page so that grapphics redraw, the IDE reports a access violation exception that is apparently caught withing the WebBrowser. Everything displays fine. The call stack goes back into MSHTML. Does anyone have any idea what this is?