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Output message from the last tool executed. When running within a script tool, message becomes part of the tool messages, otherwise outputs to console
[Visual Basic .NET]
Public Sub AddReturnMessage ( _
    ByVal Index As Integer _
)
[C#]
public void AddReturnMessage (
    int Index
);
[C++]
HRESULT AddReturnMessage(
  long Index
);
[C++] Parameters Index [in]
Index is a parameter of type long