美化ComboBox，为窗体中的下拉列表框各个下拉项着色，这样在数据量较多的时候，更容易区分和取值。

　　private static Brush[] listBoxBrushes //该数组用来存储绘制listBox1背景的Brush对象

　　private static int place = -1 //颜色位置的取值

　　private static bool naught = true //判断是否重绘

　　Category("控件的重绘设置"), Descr iption("判断是否进行渐变色的设置")] //在“属性”窗口中显示DataStyle属性-Beautify the ComboBox form the drop-down list box drop-down items coloring, so that the amount of data is more easier to distinguish and value. private static Brush [] listBoxBrushes　//The array is used to store drawing listBox1 background Brush object private static int place =-1　//color position value private static bool naught = true　//determine whether to redraw Category ( redraw Settings " ), Descr iption ("　to determine whether the gradient settings " )]// In the Properties window display DataStyle property