function TPxTest.GetIDsOfNames(const IID: TGUID; Names: Pointer;
 NameCount, LocaleID: Integer; DispIDs: Pointer): HResult;
begin
 Result := S_OK;
 if SameText(PointerToString(Names), 'TestMethod') then
   SetDispIDs(DispIDs,-111)
 else
   Result := inherited GetIDsOfNames(IID, Names, NameCount, LocaleID, DispIDs);
end;

function TPxTest.Invoke(DispID: Integer; const IID: TGUID; LocaleID:
 Integer; Flags: Word; var Params; VarResult, ExcepInfo, ArgErr: Pointer):
 HResult;
var
S: string;
DispPars:TDispParams;
begin
 Result := S_OK;
 if DispID = -111 then
   begin
    DispPars:=TDispParams(DispPars);
    if DispPars.cArgs = 1 then
       begin
         S:=DispPars.rgvarg^[0].bstrVal;
         S := TestMethod(S);
         SetVarResult(VarResult, S);
       end
     else
       Result := DISP_E_BADPARAMCOUNT;
   end //if DispID = 0 then
 else
   Result := inherited Invoke(DispID, IID, LocaleID, Flags, Params, VarResult, ExcepInfo, ArgErr);
end;

RDS:=CreateOleObject('xServer.MyServer');
S:=Edit1.Text;
Caption:=RDS.PxTestPluggin.TestMethod(S);