ArcGIS Pro 2.7 API Reference Guide
IGPMessage Interface
Members 

ArcGIS.Desktop.Core.Geoprocessing Namespace : IGPMessage Interface
Help retrive properties of Geoprocessing message.
Syntax
public interface IGPMessage 
Public Interface IGPMessage 
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

IGPMessage Members
ArcGIS.Desktop.Core.Geoprocessing Namespace