ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Framework.Contracts Namespace / ComboBox Class / OnDropDownOpened Method
Version

OnDropDownOpened Method (ComboBox)
Invoked when the combo box's drop-down list is opened.
Syntax
protected internal virtual void OnDropDownOpened()
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also