public Outlook.Search RunAdvancedSearch(string wordInSubject) { string scope = "Inbox"; string filter = String.Format( "@SQL=(\"urn:schemas:calendar:datereceived\" >= '{0:g}' " + "AND \"urn:schemas:mailheader:subject\" LIKE '%{1}%')", DateTime.Today.ToString("g"), wordInSubject); string ff1 = "urn:schemas:httpmail:datereceived >= '" + DateTime.Today.ToString("g") + "' AND " + "urn:schemas:mailheader:subject LIKE '%" + wordInSubject + "%' AND " + "urn:schemas:mailheader:sender LIKE '%" + "*****@*****.**" + "%'"; advancedSearch = null; Outlook.MAPIFolder folderInbox = null; Outlook.MAPIFolder folderSentMail = null; Outlook.NameSpace ns = null; try { ns = OApp.GetNamespace("MAPI"); folderInbox = ns.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox); folderSentMail = ns.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderSentMail); scope = "\'" + folderInbox.FolderPath + "\',\'" + folderSentMail.FolderPath + "\'"; advancedSearch = OApp.AdvancedSearch(scope, ff1, true, advancedSearchTag); OApp.AdvancedSearchComplete += Application_AdvancedSearchComplete; return(advancedSearch); } catch (Exception ex) { Console.WriteLine("\n\tException: " + ex.Message); return(advancedSearch); } }