It's called "XML Documentation", and you can read about it here:
http://msdn.microsoft.com/en-us/library/ms172652.aspx[
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Set "Generate XML documentation file" in Project menu, click Properties, Compile page.
Then type ''' before your method.
Public Sub Print_TITEM(Status As String, Type As String)
sb.AppendLine("TITEM" & Lcount(LineCount) & Status & Type)
LineCount += 1
End Sub