图形的绘制，如何使用自定义画笔（颜色，线宽，线型）。如何为程序中添加选项菜单和选项设置对话框，如何使用标准颜色对话框，如何使用字体对话框，在选项对话框中实现预览功能。实现选项对话框和窗口类中的数据交换。如何改变对话框和控件的背景色，如何改变控件的文本颜色，对按钮控件的特殊处理。如何在窗口中显示一幅位图。-Graphics rendering, how to use a custom brush (color, line width, linear). Procedures for how to add menu options and option settings dialog box, and how to use the standard Color dialog box, and how to use the Font dialog box, in the Options dialog box to achieve the preview feature. The realization of the Options dialog box and the window class of data exchange. How to change the dialog box and controls the background color, how to change the control text color of the button controls the special handling. How to display a window bitmap.