MFC绘制三次B样条曲线和贝塞尔曲线，并且可以移动控制点，变换曲线形状。-Using MFC to draw the curve of cubic B spline and bezier, and can move the control points, transform curve shape.

曲线三次样条涉及到数值分析啊，不知道GDI里面有没有现成的函数，用贝塞尔曲线画也能够实现光滑效果！(Curve three times the sample involves the numerical analysis ah, do not know GDI there is no ready function, with the Bezier curve painting can also achieve smooth effect!)