ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Framework.Controls Namespace / EmbeddableControl Class / OpenAsync Method

OpenAsync Method (EmbeddableControl)
Occurs when the control is hosted.
Syntax
public virtual Task OpenAsync()
Remarks
Leaf classes should override this function if they need to perform any asynchronous initialization.
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also