用visual C++实现在窗口的菜单栏添加绘图菜单，在菜单中有点、直线、矩形、椭圆、设置、颜色和字体的选项，点击对应的项可以完成对应的功能。-Use visual C++ realize in the window the menu bar add graphics menu in the menu is a little, linear, rectangular, elliptical, Settings, color and font options, click the correspo