[]
Gets or sets the subject of the specified e-mail hyperlink.
Use this property to store and retrieve the subject associated with a mailto: hyperlink.
If the subject contains spaces or reserved URI characters, encode it as a URI component before assigning it to this property.
string EmailSubject { get; set; }
Property EmailSubject As String
IRange cell = worksheet.Range["A1"];
IHyperlink hyperlink = cell.Hyperlinks.Add(cell, "mailto:us.sales@mescius.com");
hyperlink.EmailSubject = "Product%20Inquiry";
string subject = hyperlink.EmailSubject;