'Declaration
 
Public Delegate Sub GroupExpansionChangingEventHandler( _
   ByVal sender As Object, _
   ByVal e As GroupExpansionChangingEventArgs _
) 

'Usage
 
Dim instance As New GroupExpansionChangingEventHandler(AddressOf HandlerMethod)

public delegate void GroupExpansionChangingEventHandler( 
   object sender,
   GroupExpansionChangingEventArgs e
)

Parameters

sender

e

.NET: net5.0, net5.0-windows, net6.0, net6.0-macos, net6.0-windows, net7.0, net7.0-macos, net7.0-windows, net8.0, net8.0-browser, net8.0-macos, net8.0-windows, net9.0, net9.0-browser, net9.0-macos, net9.0-windows, net10.0, net10.0-browser, net10.0-macos, net10.0-windows.

.NET Framework: net40, net403, net45, net451, net452, net46, net461, net462, net463, net47, net471, net472, net48, net481.

Reference

GroupExpansionChangingEventHandler Members
Xceed.Wpf.DataGrid Namespace