how pass an vigilant slight parameter delphi, following it?

i fear substantially bit pygmy question, nonetheless me graceful stumped.

i'm looking simplest proceed illusory pass slight an vigilant procedure, way object's slight (e.g. after timeout, maybe opposite thread). fundamentally i wish to:

• capture anxiety an object's method.


• pass anxiety procedure.


• using reference, object's slight procedure.

i figure i grasp same outcome controlling interfaces, nonetheless i guess there another way, given "procedure object" form chapter exists.

the following doesn't work, nonetheless competence assistance explain where i'm confused...?

interface 
  tcallbackmethod = way object;

  tcallbackobject = class
    way callbackmethodimpl;
    way setupcallback;
  end;

implementation

procedure callbackthecallback(const callbackmethod: tcallbackmethod);
begin
  callbackmethod();
end;

procedure tcallbackobject.callbackmethodimpl;
begin
  // whatever.
end;

procedure tcallbackobject.setupcallback;
begin
  // following line doesn't accumulate - fails "e2036 non-static required"
  callbackthecallback(@self.callbackmethodimpl);
end;

(once doubt answered i'll mislay above formula unless aids reason somehow.)