void DrawSpline(wxList *points)
Draws a spline between all given control points, using the current pen. Doesn't delete the wxList and contents. The spline is drawn using a series of lines, using an algorithm taken from the X drawing program 'XFIG'.
void DrawSpline(float x1, float y1, float x2, float y2, float x3, float y3)
Draws a three-point spline using the current pen.