Convert Microsoft COM to XPCOM

// Sample_mscom.idl : IDL source for Sample_mscom
//

// This file will be processed by the MIDL tool to
// produce the type library (Sample_mscom.tlb) and marshalling code.

import "oaidl.idl";
import "ocidl.idl";

[
	object,
	uuid(668C357B-5FB9-4743-8FE8-591B40ECE9A2),
	dual,
	nonextensible,
	helpstring("ISampleAdd Interface"),
	pointer_default(unique)
]
interface ISampleAdd : IDispatch{
	[id(1), helpstring("method Add")] HRESULT Add([in] LONG FisrtNumber, [in] LONG SecondNumber, [out,retval] LONG* ResultValue);
};
[
	uuid(83709A99-E59B-4A9A-8714-7C27FD3FFDFB),
	version(1.0),
	helpstring("Sample_mscom 1.0 Type Library")
]
library Sample_mscomLib
{
	importlib("stdole2.tlb");
	[
		uuid(3B0F2BED-F4D5-4AA2-9534-0EB14C66CCB1),
		helpstring("SampleAdd Class")
	]
	coclass SampleAdd
	{
		[default] interface ISampleAdd;
	};
};