this.idl

The source code samples for chapter 2, 4, 6, and 8 are contained in the EvenChapters project. Those

// this.idl : IDL source for this.dll
//

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

import "oaidl.idl";
import "ocidl.idl";
    
    interface IBalloon;

	[
		object,
		uuid(CB693B56-80E2-11D2-987D-00600823CFFB),
	
		helpstring("IBalloonMan Interface"),
		pointer_default(unique)
	]
	interface IBalloonMan : IUnknown
	{
		[helpstring("method CreateBalloon")] HRESULT CreateBalloon(long rgbColor, IBalloon** ppBalloon);
	};
	[
		object,
		uuid(CB693B58-80E2-11D2-987D-00600823CFFB),
	
		helpstring("IBalloon Interface"),
		pointer_default(unique)
	]
	interface IBalloon : IUnknown
	{
		[propget, helpstring("property Color")] HRESULT Color([out, retval] long *pVal);
	};
	[
		object,
		uuid(CB693B5E-80E2-11D2-987D-00600823CFFB),
	
		helpstring("ISmartProxy Interface"),
		pointer_default(unique)
	]
	interface ISmartProxy : IUnknown
	{
	};

[
	uuid(CB693B4A-80E2-11D2-987D-00600823CFFB),
	version(1.0),
	helpstring("this 1.0 Type Library")
]
library THISLib
{
	importlib("stdole32.tlb");
	importlib("stdole2.tlb");

    interface IBalloon;

	[
		uuid(CB693B57-80E2-11D2-987D-00600823CFFB),
		helpstring("BalloonMan Class")
	]
	coclass BalloonMan
	{
		[default] interface IBalloonMan;
	};
	[
		uuid(CB693B5F-80E2-11D2-987D-00600823CFFB),
		helpstring("SmartProxy Class")
	]
	coclass SmartProxy
	{
		[default] interface ISmartProxy;
	};
};