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| ArcObjects Help for .NET developers > ArcObjects namespaces > GeoprocessingUI > ESRI.ArcGIS.GeoprocessingUI > Interfaces > IA > IArcToolbox Interface > IArcToolbox.OnCreate Method (ArcObjects .NET 10.5 SDK) | 
Called after the ArcToolbox object is created to initialize it.
[Visual Basic .NET] Public Sub OnCreate ( _ ByVal app As AppRef _ )
[C#] public void OnCreate ( AppRef app );