图中两个窗口的实现类是从CControlBar派生出来的，我们并不需要从头到尾实现该类，因为Cristi Posea先生已经为我们实现了一个称为CSizingControlBar的类，而且做得相当完美！我们所要做的便是好好地利用该类,为了尽可能地简洁，笔者将CSizingControlBar类修改了一下并命名为CCoolBar,接下来我们将详细介绍如何利用该类实现我们所需的界面。-Figure realize two window type is derived from the CControlBar We do not need from start to finish to achieve such, because Mr. Cristi Posea has called us to realize a CSizingControlBar class, and done quite perfect! We need to do is make good use of this kind, as much as possible for simplicity, I will modify a bit CSizingControlBar category and was named CCoolBar, followed by details on how we will realize we need the use of such interface.