贝塞尔曲线演示程序 VB代码，利用API函数在图片框内画出贝塞尔曲线-Bessel curve Demonstration Program VB code, using API functions in the pictures painted box Bessel curve

实例效果：此实例实现三个图片框的背景色一起变色。 实例的窗体布局见图： 程序的工程窗口： 源代码如下-Example effect: this instance to achieve three picture frame color with the background color. Example form layout shown in Figure: engineering program window: source code is as follows