Calling Direct Method from client side .js

[AnFil]

Hello again,

sorry for persisting on the subject.
In our current Ext.Net 3 architecture we rely heavily on calling Direct Methods from client JS functions.
I appreciate the Direct Event example provided above, but what interest us is what is the equivalent of adding a [Direct Method] attribute to a function in order to make it accessible in the App.Direct client side namespace?

We basically use Web Forms in its most basic format, executing ASP.NET code only in the Page_Load method. Everything else happens in [Direct Method] functions. So, essentially, we do not use [Direct Events] which require binding to specific DOM Components.
In a similar approach, can we have code execute server side without having to use a Direct Event but rather call a Direct Method as per below?

Client Side:

function do_register() {

  App.direct.Register(
                      {
                        success: function (result) {
                          if (result) {
                            close_register();
                          }
                        },
                        eventMask: { showMask: true, msg: App.WAIT },
                        failure: function (errorMsg) { Ext.Msg.alert(App.PROBLEM, errorMsg); }
                      });
}

Server side:

[DirectMethod]
  public bool Register()
  {
     //some code
     return false;
  }

Thank you very much for your time.
Kind regards.