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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?


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

Article ID: Published Date: Last Revised Date: Platform: Control:
1045 04/30/2011 07/10/2014 WinForms DockingManager
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