excuse me, the fit1 etc. points are a red herring, left over from an early attempt
Tony

If I create 3 or 4 points on the screen in a simple curve I can easily connect them with a spline curve using the mouse without specifying start and end tangents. However in VBA I tried: Public Sub TestAddSpline() Dim objEnt As IntelliCAD.Spline Dim vecstart As New IntelliCAD.Vector Dim vecend As Ne...