crtl圆、shift矩形、crtl+shift矩形加圆程序，改成MFC基于单文本的MFC应用程序，加一个工具栏、菜单条，实现不同颜色的填充。-crtl round, shift rectangle, crtl+shift rectangle plus round program, MFC MFC-based applications into a single text, plus a toolbar, menu bar, filled with different colors to ach