[This is preliminary documentation and subject to change.]
The IsInclude property indicates whether the event includes a pre-existing enhancement stream into the current stream.
object.IsInclude [ = lVal ] 
 
  Windows NT: Unsupported.
  Windows: Requires Windows 98.
  Windows CE: Unsupported.
  Header: Declared in stream.idl.
  Import Library: Included as a resource in stream.dll.
  Unicode: Yes.
Including One Enhancement Stream in Another
The following example tests whether the most recently added event includes a stream. As written, the following example will always display a message box that reads "This is an include event."
evs.AddText("0:32.0 Include MyStream.str")
Set e = evs.LastAdd
 
If e.IsInclude = 0 Then
  MsgBox "This is not an include event."
Else
  MsgBox "This is an include event."
End If