说明：  B函数画图形的源码示例，生成图形的VB绘图实例，设置Picture1控件使其中心点坐标为(0,0)，Picture1.Cls清除其他图形，以下三行VB代码实现在Picture1中绘制黑色的水平坐标轴和垂直坐标轴。 　　Picture1.ForeColor = &H0 　　Picture1.Line (-300, 0)-(300, 0) 　　Picture1.Line (0, 300)-(0, -300) 　　开始绘制白色函数图形
(B function source code examples drawn graphics, drawing examples VB generated graphics, Picture1 control to set the center point coordinates (0,0), Picture1.Cls remove other graphics, the following three lines of VB code to draw a black horizontal in Picture1 axis and the vertical axis. Picture1.ForeColor = & H0 Picture1.Line (-300, 0)- (300, 0) Picture1.Line (0, 300)- (0,-300) White began drawing function graphs)