MFC的单文档多视图分割的关键代码。程序结构简单，便于初学者学习。采用CSplitterWndEx分割视图。-MFC single document multi-view the key code partition. Program structure is simple, easy for beginners to learn. CSplitterWndEx view the use of segmentation.

MFC下，将窗口切割成多个视图，以便进行多交互界面，程序比较实用。-MFC, will cut more than one view window for multi-interface, the program more practical.