How do I simulate a page in the Global.asax?

The final goal I want is to get a request (eg: Pepe.aspx) and execute a C # method directly. I already achieved it but the HttpContext has the session in null (I know because it is in null)

In the global.asax I put:

protected void Application_BeginRequest(object sender, EventArgs e)
{
     if (BaseApp.VirtualPageManager.ExecutePage())
     {
        CompleteRequest();
     }
}

That function magically seeks and executes the method of this class:

public class TestPage: IVirtualPage
{
    public static void Pepe()
    {
        //Do something..
        Request;
        Response;
        HttpContext.Current.Session;
    }
}

That works already, but session obviously is always null because I'm calling the function from the BeginRequest of the global.

Now if I take it out of the begin request and put:

protected void Application_AcquireRequestState(object sender, EventArgs e)
{
  if (BaseApp.VirtualPageManager.ExecutePage(Path.GetFileName(Request.PhysicalPath), Request, Response))
  {
     CompleteRequest();
  }
}

But if I do this, you never get to run Application_AcquireRequestState because Pepe.aspx does not exist. That's why my idea was to find out how I can tell you in some way if it exists, process it, give me the session, and then I'll return a request.

Any ideas on how to have the session or councils on how to create a virtual page?