Updating Parent Control from Child User Control

[RJ]

Hi All,
Just wondering how can I update parent control from child user control?
Here's the structure of my Page
Master Page
    Parent Aspx with my radmenu
         User Control with button.

When I click on my button it updates my radmenu when theres postback,
but when its ajaxified my radmenu wont update.

Any code I could use to link child to update parent control with Ajax.

Thanks in advance,
RJ

[RJ]

This code doesn't work for me.
'Get the WebUserControl
    Dim MyControl As UserControl = CType(Page.FindControl("WebUserControl1"), UserControl)

    'Get user control's button and label
    Dim MyButton As Button = CType(MyControl.FindControl("Button1"), Button) ---> Error on this line. NullReferenceException
    Dim MyLabel As Label = CType(MyControl.FindControl("Label1"), Label)

    'Add the necessary AJAX setting programmatically
    RadAjaxManager1.AjaxSettings.AddAjaxSetting(MyButton, MyLabel)

[RJ]

Was able to make it work.