Hi I found the macro bellow and it claims to draw a involute spur gear but I cannot get it to run.  Can anyone advise please?

I have tried opening a part, creating a new macro, pasting the text and then running but nothing happens

Sub main()

Set swApp = Application.SldWorks

Set Part = swApp.ActiveDoc

'----------

R = 71.6034 'ENTER BASE CIRCLE RADIUS

pi = 4 * Atn(1)

For Ang = 0 To 45 Step 2

X1 = Cos(Ang / 180 * pi) * R

Y1 = Sin(Ang / 180 * pi) * R

Opp = R * 2 * pi

Opp = Opp * (Ang / 360)

Hyp = Sqr(R ^ 2 + Opp ^ 2)

Ang2 = Atn(Opp / R)

Ang2 = Ang2 / pi * 180

Ang3 = Ang - Ang2

X2 = Hyp * Cos(Ang3 / 180 * pi)

X2 = Int(X2 * 10000 + 0.5) / 10000

Y2 = Hyp * Sin(Ang3 / 180 * pi)

Y2 = Int(Y2 * 10000 + 0.5) / 10000

XX = X2 / 1000

YY = Y2 / 1000

Part.CreateLine2 X, Y, 0, XX, YY, 0

X = XX

Y = YY

Next Ang

'----------

End Sub

Thanks in anticipation.........

Cameron