<%@ Page %>
<%@ Reference Control="control.ascx" %>
void Page_Load(Object sender, EventArgs e)
{
Control sampleControl = LoadControl("Control.ascx");
Controls.Add(sampleControl);
}
C# version (control.ascx)
<%@ Control Language="C#" %>
void Page_Load(Object sender, EventArgs e)
{
AuthorLabel.Text = "Sample Control Text";
}