Sean McGrath at ITworld.com - The library IS the programming language:

"In my opinion, any competent programmer should be able to pick up a new imperative programming language in a couple of days. They are all the same really. Actually, deep down they are in fact totally the same. However, it is not reasonable to expect a competent programmer to be productive in application development after those couple of days. The reason being that real world applications are not developed primarily IN a programming language. They are developed primarily ON a platform - a library of pre-developed code doing everything from opening databases to drawing GUI screens. These libraries are, these days, behemoths. So big that competent programmers can and do spend literally years wrapping their heads around them."