ArcGIS Pro 2.6 API Reference Guide
ToolElement Property

ArcGIS.Desktop.Framework.Contracts Namespace > Pane Class : ToolElement Property
Gets or sets the Pane's HwndHost if applicable.
Syntax
public FrameworkElement ToolElement {get; set;}
Public Property ToolElement As FrameworkElement
Remarks
If your custom Pane ultimately hosts a System.Windows.Interop.HwndHost, use this property to give the framework access to the HwndHost so it may properly establish focus./>
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

Pane Class
Pane Members