How to display modified body after Outlook ItemLoad - email

Question

I have code to parse emails and add "tel:" links to phone numbers, but the modified email body doesn't get shown in the Outlook Reading Pane until the user manually reloads it (view another email, come back to this one).
I've tried a few hacks like Inspector.Display, and ActiveExplorer.ClearSelection ActiveExplorer.AddToSelection, but I can't get consistent results (Display will open new Inspectors for some users, very undesirable).
I was also going to investigate hooking the event sooner. Somehow accessing the email body before Outlook renders it, to avoid the need to refresh. I'm very new to VSTO, so I don't know what event would have access to the MailItem but happen after a user selects it and before it is rendered. I have thought about only processing new mail, but that doesn't help when I roll out this addin, only going forward.
Here is my current ItemLoad sub:
Private Sub Application_ItemLoad(Item As Object)
Dim myObj As Outlook.MailItem
Dim ob As Object
ob = GetCurrentItem()
If TypeOf ob Is Outlook.MailItem Then
myObj = ob
Dim oldbody As String = myObj.Body
If myObj.HTMLBody.Length > 0 Then
myObj.HTMLBody = RegularExpressions.Regex.Replace(myObj.HTMLBody, "(?<!tel:)(?<![2-9\.])(?<!\>\ )[+]?(1-)?(1)?[\(]?(?<p1>\d{3})[\)]?[\.\- ]?(?<p2>\d{3})[\.\- ]?(?<p3>\d{4})(?=[^\d])", " ${p1}-${p2}-${p3}")
Else
myObj.Body = RegularExpressions.Regex.Replace(myObj.Body, "(?<!tel:)(?<![2-9\.])[+]?(1-)?(1)?[\(]?(?<p1>\d{3})[\)]?[\.\- ]?(?<p2>\d{3})[\.\- ]?(?<p3>\d{4})(?=[^\d])", "tel:${p1}.${p2}.${p3}")
End If
myObj.Save()
refreshCurrentMessage()
End If
End Sub
GetCurrentItem() just returns either objApp.ActiveExplorer.Selection.Item(1) or objApp.ActiveInspector.CurrentItem based on TypeName(objApp.ActiveWindow)

Answer 1

Outlook doesn't reflect changes made through the OOM immediately. You need to switch to another folder/email to get the item refreshed because there is no way to update the item on the fly.
You can use the CurrentFolder property of the Explorer class which allows to set a Folder object that represents the current folder displayed in the explorer. Thus, the view will be switched to another folder. Then you can set the CurrentFolder folder to initial folder.
Also I'd suggest releasing all underlying COM objects instantly. Use System.Runtime.InteropServices.Marshal.ReleaseComObject to release an Outlook object when you have finished using it. Then set a variable to Nothing in Visual Basic (null in C#) to release the reference to the object.