Include following code at the top of ascx page

<%@ Register TagPrefix="dnn" TagName="BREADCRUMB" Src="~/Admin/Skins/BreadCrumb.ascx" %>

SkinObject	Code Snippet	Description	Example
dnn:BREADCRUMB	< dnn:Breadcrumb runat="server" id="dnnBreadcrumb">	Displays the path to the currently selected tab in the form of TabName1 > TabName2 > TabName3