在VB环境下绘制的三次 Bezier曲线,还不完善尚在修改中-in VB environment mapping of cubic Bezier curve, change is still not perfect! !

vb写的样条曲线源代码，根据数值分析里面的算法，给定的边界条件-vb wrote spline curve source code, according to numerical analysis of the algorithm which, given the boundary conditions