内部含有六个源代码，分别是任意设置颜色的按钮控件，任意形状的按钮控件，带图形的按钮控件，带下拉选择列表的按钮控件，添加在标题栏的按钮控件，可以选取颜色值的按钮控件的源代码。这些代码均可以使用，而且编程严谨，是学习的好例子。-Containing six internal source code, respectively, are arbitrarily set the color of the button controls, arbitrary shape of the button con

This chapter works with the next six chapters to act as a foundation for the technology discussions that follow. In this chapter, some fundamental concepts and terms used in the evolving language of internetworking are addressed. In the same way