helix BVBA

I do VB to create DXF files so they can be loaded into either full ACAD or LT. I think the following code gives a passable helix based on straight lines in 3D space. You may find it helpful.
Regards
The form has three inputs "number of rotations", "radius" and "pitch" and two buttons "Create helix" and "EXIT"
Private Sub Command1_Click() End End Sub
Private Sub Command2_Click() Nr = Val(Text1.Text) 'number of rotations Rad = Val(Text2.Text) 'radius of helix Pt = Val(Text3.Text) 'pitch of helix 'use 5 deg increments Inc = 360 / 5 'number if increments in a pitch Zi = Pt / Inc 'position in Z axis Itot = Nr * Inc ' total number of increments X1 = Rad 'initial x Y1 = 0 'initial y Z1 = 0 'initial z I = 1
dxfTempFile = "C:\tempHelix.dxf" 'dxfTempFile = GetTempFileName FileNo = FreeFile newCreateDXF.FileNo = FileNo 'passes FileNo to DXF module Open dxfTempFile For Output As #FileNo 'Open dxfTempFile For Output As #1
Lay = "Helix" Ltype = "Continuous" Call dxfHeader(-Val(Text2.Text) - 1, -Val(Text2.Text) - 1, Val(Text2.Text) + 1, Val(Text2.Text) + 1) Call dxfStartTables Call dxfAddLayer(Lay, 1) Call dxfEndLayerTable Call dxfEndTables Call dxfStartEntity While I < (Itot + 1) X2 = Val(Text2.Text) * Cos(I * 0.087266) Y2 = Val(Text2.Text) * Sin(I * 0.087266) Z2 = I * Zi Call dxfAddLine(X1, Y1, Z1, X2, Y2, Z2, Lay, Ltype, 1) X1 = X2 Y1 = Y2 Z1 = Z2 I = I + 1 Wend Call dxfClose Close #FileNo
End Sub
Private Sub Form_Load() Text1.Text = "1" Text2.Text = "1" Text3.Text = "1" End Sub