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CancelablePaneEventArgs クラス

単一の DockablePaneBase を渡すキャンセル可能なイベントに使用されるイベントパラメーター。
シンタックス
'宣言
 
Public Class CancelablePaneEventArgs 
   Inherits System.ComponentModel.CancelEventArgs
public class CancelablePaneEventArgs : System.ComponentModel.CancelEventArgs
使用例
Imports Infragistics.Shared
Imports Infragistics.Win
Imports Infragistics.Win.UltraWinDock

Private Sub ultraDockManager1_BeforeToggleDockState(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinDock.CancelablePaneEventArgs) Handles ultraDockManager1.BeforeToggleDockState

    ' The BeforeToggleDockState is invoked when the user
    ' double clicks on the caption or tab item for a pane
    ' but before the window has changed position from
    ' floating to docked (or vice versa).
    ' The Cancel parameter can be set to true to cancel
    ' the change.

    ' Assuming a structure of:
    ' DockArea1
    '		Child1
    '		Child2
    ' DockArea2
    '		Child3
    ' With the following code, the user could double click
    ' on the caption of DockArea1, DockArea2, or Child3
    ' to change they're state from floating to docked.
    '

    ' Do not allow the members of a group to have their 
    ' state toggled from docked to floating or floating 
    ' to docked if the pane has siblings
    '
    If (Not e.Pane.Parent Is Nothing AndAlso e.Pane.Parent.Panes.Count > 1) Then
        e.Cancel = True
    End If

End Sub
using Infragistics.Shared;
using Infragistics.Win;
using Infragistics.Win.UltraWinDock;
using System.Diagnostics;

private void ultraDockManager1_BeforeToggleDockState(object sender, Infragistics.Win.UltraWinDock.CancelablePaneEventArgs e)
{

	// The BeforeToggleDockState is invoked when the user
	// double clicks on the caption or tab item for a pane
	// but before the window has changed position from
	// floating to docked (or vice versa).
	// The Cancel parameter can be set to true to cancel
	// the change.

	// Assuming a structure of:
	// DockArea1
	//		Child1
	//		Child2
	// DockArea2
	//		Child3
	// With the following code, the user could double click
	// on the caption of DockArea1, DockArea2, or Child3
	// to change they're state from floating to docked.
	//

	// Do not allow the members of a group to have their 
	// state toggled from docked to floating or floating 
	// to docked if the pane has siblings
	//
	if (e.Pane.Parent != null && e.Pane.Parent.Panes.Count > 1)
		e.Cancel = true;

}
参照