rem: var cwindowManager = Components.classes['@mozilla.org/rdf/datasource;1?name=window-mediator'].getService(); 
add: var cwindowManager = Components.classes['@mozilla.org/appshell/window-mediator;1'].getService(); 
context: function SendMessageNow(){  var cwindowManager = Components.classes['@mozilla.org/rdf/datasource;1?name=window-mediator'].getService();  var iwindowManager = Components.interfaces.nsIWindowMediator;             var windowManager  = cwindowManager.QueryInterface(iwindowManager);       var composeWindow = windowManager.getMostRecentWindow('msgcompose'); //find the open msgcompose window and get it        composeWindow.SendMessage(); //send the message that we've invoked a Reply To window for}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/e4d4ba3ccbdd712e9c2c25d1f0f6944029a04675/mailSmoketestOverlay.js/clean/mailnews/extensions/smoketest/resources/content/mailSmoketestOverlay.js