1.2 如何获得应用程序主窗口的指针\Demo\Demo.cpp
................................\....\Demo.dsp
................................\....\Demo.dsw
................................\....\Demo.h
................................\....\Demo.plg
................................\....\Demo.rc
................................\....\DemoDlg.cpp
................................\....\DemoDlg.h
................................\....\DemoDoc.cpp
................................\....\DemoDoc.h
................................\....\DemoView.cpp
................................\....\DemoView.h
................................\....\MainFrm.cpp
................................\....\MainFrm.h
................................\....\ReadMe.txt
................................\....\res\Demo.ico
................................\....\...\Demo.rc2
................................\....\...\DemoDoc.ico
................................\....\resource.h
................................\....\StdAfx.cpp
................................\....\StdAfx.h
................................\....\res
................................\Demo
1.2 如何获得应用程序主窗口的指针