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copied!<p>In my opinion you should raise event from UC_Menu.ascx, then handle it in Master page and raise event again from Master page already. Finally you can intercept event with event handler in Customer.aspx and call function from UC_Details.ascx.</p> <p>So, the code for this issue should be:</p> <p>1) Inside your UC_Menu.ascx.vb raise an event:</p> <pre><code>Partial Class UserControls_UC_Menu Inherits System.Web.UI.UserControl Public Event SomethingChanged As EventHandler Public Sub SomethingHappend() RaiseEvent SomethingChanged(Me, EventArgs.Empty) End Sub End Class </code></pre> <p>2) In Master page catch event and raise it to Customer.aspx</p> <pre><code>Public Event SomethingChanged As EventHandler Private Sub UC_MenuInstance_SomethingChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles UC_Menu.SomethingChanged RaiseEvent Me.SomethingChanged(Me, EventArgs.Empty) End Sub </code></pre> <p>3) Define in Customer.aspx markup after page directive:</p> <pre><code><%@ MasterType VirtualPath="~/MasterPages/MainLayout.master" %> </code></pre> <p>4) Inside UC_Details.ascx.vb define some method that should be called:</p> <pre><code>Public Sub DoWork() 'Do some work here End Sub </code></pre> <p>5) Place into Customer.aspx.vb:</p> <pre><code>' Add handler for Master page event Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) AddHandler Me.Master.SomethingChanged, AddressOf MasterEventHandler End Sub ' Call UC_Details user control function here Private Sub MasterEventHandler(ByVal source As Object, ByVal e As EventArgs) UC_DetailsInstance.DoWork() End Sub </code></pre>

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