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Change Pitch of Helix (VBA)

This example shows how to change the pitch of a helix.

' Preconditions:
' 1. Model containing a helix feature is open.
' 2. Helix feature is selected.
' 3. Open the Immediate window.
' 4. Run the macro.
' Postconditions:
' 1. Pitch of selected helix feature is modified.
' 2. Name of helix feature, original pitch, and
'    modified pitch values are printed to the 
'    Immediate window.
Option Explicit
Sub main()
    Dim swApp                   As SldWorks.SldWorks
    Dim swModel                 As SldWorks.ModelDoc2
    Dim swSelMgr                As SldWorks.SelectionMgr
    Dim swFeat                  As SldWorks.Feature
    Dim swHelix                 As SldWorks.HelixFeatureData
    Dim bRet                    As Boolean    
    Set swApp = Application.SldWorks
    Set swModel = swApp.ActiveDoc
    Set swSelMgr = swModel.SelectionManager
    Set swFeat = swSelMgr.GetSelectedObject6(1, -1)
    Set swHelix = swFeat.GetDefinition
    Debug.Print "Feature = " & swFeat.Name
    Debug.Print "  Original pitch = " & swHelix.Pitch * 1000# & " mm"
    ' Change the pitch value
    swHelix.Pitch = 1.25 * swHelix.Pitch
    Debug.Print "  Modified pitch = " & swHelix.Pitch * 1000# & " mm"
    ' Apply the change
    bRet = swFeat.ModifyDefinition(swHelix, swModel, Nothing): Debug.Assert bRet
End Sub


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