IGXDialog with ArcEngine Arc 10

I have asked before and not gotten a clear answer, so hoping this will be the ticket. I have an ArcEngine 9.3 application the uses IGXDialog and IExportOperation, it worked fine, but now that I am in 10.1, it doesn't recognize these libraries. According to EDN I shouldn't have been able to use these at for ArcEngine!!! But I did set the licenses to both desktop and Engine when the original application was initiated. I have had some response that I have to bind my license before using any ArcObjects, which is what I do like this ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.Engine) and ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.Desktop) , because I understand that if I get Desktop license involved, then I can use these libraries. But I still get errors.

I have been to this site http://resources.arcgis.com/en/help/...000002ns000000
but it didn't help me either. I need some very explicit example on how to do this please.

thanks