C# Outlook Custom Header Manager

Development with Csharp. Outlook 2007, 2010. I want 2 methods to add/modify Outlook message's headers on the fly without fire security alert. For example, if I have message (mailItem) into my mailbox and I want add "X-webmail: [login to view URL]", either I get it in my Inbox or I move it into another folder. I want see my custom header into its message header section. Example of call: - addHeaderFields(ref mailItem, "X-webmail: [login to view URL]"); or if It more than one custom headers. - addHeaderFields(ref mailItem, "X-webmail: [login to view URL]\n"X-Recieved: Outlook2007"); private void addHeaderFields(ref [login to view URL] mailItem, string Header) { } Example of call: - modifyHeaderFields(ref mailItem, "Subject", "This email has been modified"); private void modifyHeaderFields(ref [login to view URL] mailItem, string propertyName, object propertyValue) { }