ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Framework.Contracts Namespace / Module Class / OnPaneClosing Method
The Pane being closed.
The event data associated with the closing event. Set the Cancel property to false to cancel the action.
Version

OnPaneClosing Method (Module)
Called by the Framework when one of the Module's Pane is about to close.
Syntax
protected internal virtual void OnPaneClosing( 
   Pane pane,
   CancelRoutedEventArgs e
)

Parameters

pane
The Pane being closed.
e
The event data associated with the closing event. Set the Cancel property to false to cancel the action.
Remarks
Modules are automatically notified whenever one of its panes are activated, deactivated, opened, or closed. This means a Module doesn’t have to listen to the Framework’s ActivePaneChanged event and from here filter for its panes; instead, Modules are given direct notification that one of their panes changed.
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also