[uuid(C7E9002B-9E7F-43b5-971D-E2539E6039C2), version(1.0), helpstring ("COMDemo: Demo of COM object defined in C++")]
library COMDemo
{
	importlib("stdole2.tlb");

  [uuid(2BB79939-EE89-4ae0-BF7D-E7FB175A87CF), oleautomation, dual, hidden]
  interface SimpleDispatch : IDispatch
  {
/* These two methods are just to occupy two slots in the virtual function table. They will never be
   directly called by a container ... */
  [hidden] HRESULT VirtualDestructor([in]IUnknown *stream); // spurious parameter hides function from Excel
  [hidden] IUnknown *IID_This(); // incorrect parameter hides function from Excel
  };

// Custom class definitions ...

  [uuid(7C8721D6-3D22-48a1-A945-5FF9815C5807), odl, oleautomation, dual,
    helpstring("Name/value pair")]
  interface ITestObj : SimpleDispatch
  {
  [propget, helpstring("Name of quantity")] HRESULT Name([out,retval]BSTR *);
  [propput] HRESULT Name([in]BSTR);

  [propget, id(0), helpstring("Value (default property)")] HRESULT Value([out, retval]double *);
  [propput, id(0)] HRESULT Value([in]double);

  [helpstring("Square of value")]
      HRESULT Square([out,retval]double *square);
  };

  [uuid(5FC711F1-B9C7-4dcc-8CCC-E39F9E0F7556)]
  coclass TestObj
  {
    interface ITestObj;
  };

// Repeat for further classes. This one exposes two Excel worksheet functions ...

  [uuid(7C2676F0-142F-4898-AD85-404F52AF9559), odl, oleautomation, dual,
    helpstring("COMDemo: test worksheet functions interface")]
  interface ITestWorksheetFuncs : SimpleDispatch
  {
  HRESULT AddTwoNumbers([in]VARIANT *Number1, [in]VARIANT *Number2, [out, retval]VARIANT *);
  HRESULT JoinTwoStrings([in]VARIANT *String1, [in]VARIANT *String2, [out, retval]VARIANT *ret);
  }

  [uuid(ABA0BF16-855F-475a-8D8D-3DA02CFAFDAC), helpstring("COMDemo: test worksheet functions")]
  coclass TestWorksheetFuncs
  {
    interface ITestWorksheetFuncs;
  };

};