Question: I using RemObjects Pascal Script component for Delphi XE, i've the following code:

```
type
  ITest = interface(IInterface)
  ['{7762A355-052F-449D-8347-01B59E2D2738}']
    procedure Execute;
  end;

  TTest = class(TInterfacedObject, ITest)
  private
    procedure Execute;
  end;

```

```
procedure TForm1.Button3Click(Sender: TObject);
var T: ITest;
    o: TPSScript;
begin
  T := TTest.Create;  

  o := TPSScript.Create(nil);
  try
    o.Script.Text :=
      'begin '                                    + sLineBreak +
      '  T.Execute; '                             + sLineBreak +
      'end.';
    Execute(o);
  finally
    o.Free;
  end;
end;

```

My question is how to register the interface variable T (instance of ITest) into pascal script so that I can invoke the T.Execute in pascal script?

Answer: 
first you need to register your interface type in the OnCompile event:

```
with ps.Compiler.AddInterface(ps.Compiler.FindInterface('IUnknown'), StringToGuid('{7762A355-052F-449D-8347-01B59E2D2738}'), 'ITest') do
  RegisterMethod('procedure Execute;', cdRegister);
ps.AddRegisteredVariable('data', 'ITest');

```

then in OnExecute:

```
SetVariantToInterface(ps.GetVariable('data'), mydata);

```
It's described on their wiki, here the [article](http://wiki.remobjects.com/wiki/Using_Classes_with_RemObjects_PascalScript).
Maybe somebody can summarize it, who is into this stuff. I just found it through google.