类似于VC中workspace的控件,是我从CJ60Lib库中提取出来的并做了些修改，不依赖于CJ60Lib库，能够使程序更小，而且还修复了两个重要的bug:1.程序最小化，并恢复后，子控件不重绘。2.在controlbar处于浮动状态时，主窗口得不到响应。-VC is similar to the controls in the workspace, that is how I extracted CJ60Lib library and made some changes to CJ60Lib