说明：  Esential COM，COM本质论，一本专门讲微软COM编程技术的专业书籍，书有点老了，但对于COM的讲述对现代的COM编程仍然适用。这本书和潘爱民教授的那本COM编程书一起看，可以帮助你更好地理解COM编程的精髓。
(Esential COM, COM Essence, a program devoted to Microsoft COM technology professional books, books a little old, but about right for the COM COM modern programming still apply. This book and Professor Pan Aimin that watching this book COM programming, that can help you better understand the essence of COM programming.)