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Is there a way to find out if a control is in a tabbed dock group and what its siblings are?

Platform: WinForms |
Control: DockingManager |
Published Date: April 30, 2011 |
Last Revised Date: July 10, 2014


There is no direct API to determine the tabbed state, but this can be easily accomplished by accessing some of the internal docking windows classes. The following code tests whether the dockable control ’listBox1’ is in a tabbed dock group, and if so, lists out all controls in that group.



Syncfusion.Windows.Forms.Tools.DockHost dhost = this.listBox1.Parent as Syncfusion.Windows.Forms.Tools.DockHost;

Syncfusion.Windows.Forms.Tools.DockHostController dhc = dhost.InternalController as


if(dhc.ParentController is Syncfusion.Windows.Forms.Tools.DockTabController)


Trace.WriteLine("Control is docked as a tab");

Syncfusion.Windows.Forms.Tools.DockTabControl docktab = (dhc.ParentController as


foreach(DockTabPage tabpage in docktab.TabPages)


Control siblingcontrol = tabpage.dhcClient.HostControl.Controls[0];






Dim dhost As Syncfusion.Windows.Forms.Tools.DockHost = Me.listBox1.Parent as


Dim dhc As Syncfusion.Windows.Forms.Tools.DockHostController = dhost.InternalController as


If TypeOf dhc.ParentController Is Syncfusion.Windows.Forms.Tools.DockTabController Then

Trace.WriteLine("Control is docked as a tab")

Dim docktab As Syncfusion.Windows.Forms.Tools.DockTabControl = (dhc.ParentController as


Dim tabpage As DockTabPage

For Each tabpage In docktab.TabPages

Dim siblingcontrol As Control = tabpage.dhcClient.HostControl.Controls(0)



End If

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