ArcGIS Developer Help  (ESRI.ArcGIS.NetworkAnalysis)  

PutMessageEventHandler Delegate

Represents the method that handles the PutMessage event.
[Visual Basic .NET]
Public Delegate Sub PutMessageEventHandler ( _
    ByVal networkLoaderProgress As esriNetworkLoaderProgress, _
    ByVal extraMessage As String _
)
[C#]
public delegate void PutMessageEventHandler (
    esriNetworkLoaderProgress networkLoaderProgress,
    string extraMessage
);