Built a new project from scratch. I added the references to MS.Office.Core and MS.Office.Outlook COMs.
I even upgraded to the the Office .NET TypeLibrary (that was somehow suggested by MSDN).
Now someone PLEASE tell me: what am I doing wrong?
Imports Outlook = Microsoft.Office.Interop.Outlook
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Const msoControlButton = 6
Dim olApp As Outlook.Application
Dim myButton As Microsoft.Office.Core.CommandBarButton
olApp = CreateObject("Outlook.Application")
myButton = olApp.ActiveExplorer.CommandBars("File").Controls.Add(msoControlButton)
.name = "Whatever"
.Caption = "TestButton"