vb实现中点画线，dda画线，画圆，画Bezier曲线-The dotted line, dda draw lines, draw a circle, drawing Bezier curves

LISP调用VB生的DLL文件实例,用于画圆的一个程序-The LISP call VB raw DLL file instance, a program used to draw a circle

Spline曲线拟合的VB源代，根据鼠标的轨迹画出弧线，鼠标在右侧窗体的空白处单击，会留下圆圈，留下一定数量的圆圈后（至少两个）后，点击左上角的“运算曲线”按钮，即可将圆圈圈成线，绘制出图形。-Spline curve fitting VB source code, based on the trajectory of the mouse to draw an arc, a mouse click on a blank form on the right side, will leave the