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Is there a built-in mechanism for the user to close a page/tab in the TabBarSplitterControl? If not, what would be the recommended approach? I'm thinking probably a custom context menu with a close option...

There is no built in UI to remove a tabpage in the TabSolitterBarControl. You could use context menus to do it as you suggested. To avoid interferring with the controls drag & drop tab positions code, I would suggest trying to display the context menu as follows to enable the context menu to appear when your user right clicks the tab itself. Do not try setting the ContextMenu property for the TabSplitterControl. Use the steps below instead. 1) Use teh designer to add the context menu in the component tray with your menu items and click handlers. But do not set it as the ContextMenu property for any control. 2) Hook the TabSplitterControlBar.MouseUp event to explicitly display the menu tabBarSplitterControl1.Bar.MouseUp += new MouseEventHandler(tabbar_MouseUp); 3) event code to display the menu

private void tabbar_MouseUp(object sender, MouseEventArgs e)
{
	if(e.Button == MouseButtons.Right)
		this.contextMenu1.Show(this.tabBarSplitterControl1.Bar, new Point(e.X, e.Y));
}

4)Have your delete menu selection handler use code like this. You should explicitly dispose of any grid controls (If you don't, the close button on your form won't work ????).

private void menuItem1_Click(object sender, System.EventArgs e)
{
	foreach(Control c in this.tabBarSplitterControl1.ActivePage.Controls)
	{
		if(c is GridControlBase)
			c.Dispose();
	}
this.tabBarSplitterControl1.TabBarPages.Remove(this.tabBarSplitterControl1.ActivePage);
}