Window2.MailEnvelope Property (Microsoft.Office.Interop.InfoPath.SemiTrust)
Assembly: Microsoft.Office.Interop.InfoPath.SemiTrust (in microsoft.office.interop.infopath.semitrust.dll)
The MailEnvelope object can be used only with the editing window types; if used with a designing window type, it will return an error. It will also return an error if no form is open in the form area.
This member can be accessed only by forms running in the same domain as the currently open form, or by forms that have been granted cross-domain permissions.