Master-Detail doesn''t work with DockingManager. Pls help

I''m trying to design a master-detail form by adding two GDBGs. The following codes from users guide will work well. Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load ´fill the dataset with the two tables Me.SqlDataAdapter1.Fill(Me.DataSet11.Customers) Me.SqlDataAdapter2.Fill(Me.DataSet11.Orders) ´add a DataRelation to the dataset Dim dr As DataRelation = New DataRelation("CustomersToOrders", Me.DataSet11.Customers.Columns("CustomerID"), Me.DataSet11.Orders.Columns("CustomerID")) Me.DataSet11.Relations.Add(dr) ´set up the datasources Me.masterGrid.DataSource = Me.DataSet11.Tables("Customers") Me.detailsGrid.DataSource = Me.DataSet11.Tables("Customers") Me.detailsGrid.DataMember = "CustomersToOrders" End Sub However, after I add a dockingManager and enable masterGrid to be dockable, the detailGrid never respond to the row changes in the masterGrid any more.

In order for the master-details to work, both grid''s need to be using the same binding context. Normally, the grid takes its binding context from its parent. Try handling the DockedStateChanged event and force the two grids to have teh same BindingContext.

private void dockingManager1_DockStateChanged(object sender, DockStateChangeEventArgs arg)
{
	if(this.gridDataBoundGrid1.BindingContext == null)
		this.gridDataBoundGrid1.BindingContext = new BindingContext();
	this.gridDataBoundGrid2.BindingContext = this.gridDataBoundGrid1.BindingContext;
}

It works. Thanks Clay.