ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Desktop.Framework.Contracts Namespace / ComboBox Class / OnDropDownOpened Method

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

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also