see publics server tags in a page from another page

hello,
i need to read a public label runat server in a page from another page.
How can i do it?

i've tryed it but won't work
public static String GetFieldByPage(string pagePath) { Type type = BuildManager.GetCompiledType(pagePath); Page pageView = (Page)Activator.CreateInstance(type); Label lbl1 = (Label) pageView.FindControl("lbl1"); string lbl1Value = lbl1.Text; return lbl1Value ; }