can not generate necessary file when compile IDL file in visual studio 2010

i'm learning about COM through an internet tutorial(http://www.codeguru.com/cpp/com-tech/activex/tutorials/article.php/c5567/Step-by-Step-COM-Tutorial.htm). The first thing is creating a IDL file and compile it to create another 5 files. The detail is after:

1. Open VS2010


2. Create Win32 DLL project name AddObj



3. Add IAdd.idl file with the content

   
   
   

   
   

   import "unknwn.idl";

   
   
   

   [
   object,
   uuid(1221db62-f3d8-11d4-825d-00104b3646c0),
   helpstring("interface IAdd is used for implementing a super-fast addition Algorithm")
   ]

   
   
   

   interface IAdd : IUnknown
   {
   HRESULT SetFirstNumber(long nX1);

   
   
   

   HRESULT SetSecondNumber(long nX2);
   HRESULT DoTheAddition([out,retval] long *pBuffer);
   };

   
   
   

   [
   uuid(3ff1aab8-f3d8-11d4-825d-00104b3646c0),
   helpstring("Interfaces for Code Guru algorithm implementations .")
   ]
   library CodeGuruMathLib
   {
   importlib("stdole32.tlb");
   importlib("stdole2.tlb");

   
   
   

   interface IAdd;
   }

   
   

After that, follow the tutorial, if i compile IAdd.idl file, it will generate:

--IAdd.h Contains the C++ style interface declarations.

--dlldata.c Contains code for proxy DLL. Useful when invoking the object on a different process/computer.

--IAdd.tlb Binary file , with a well defined format that completely describes our interface IAdd along with all it's methods. This file is to be distributed to all the clients of our COM component.

--IAdd_p.c Contains marshalling code for proxy DLL. Useful while invoking the object on a different process/computer.

--IAdd_i.c Contains the interface IIDs

but when i compile IAdd by right click it and choose compile in shortcut menu, there is no file being generate. But when open view class, i can see IAdd interface with some method.

I also try it by compile it manually by download midl.exe from internet and run in command line but it failed.

I fine a lot of material by google and all said that i can compile idl file by visual studio but i try many time, on my both computer but no file being generate after i compile idl file. I also install new Win7, new visual studio 2010 ultimate but nothing change.

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