Isolate Changed Dimension (VB.NET)

'------------------------------------------------------
' Preconditions: The specified drawing and part
' documents exist.
'
' Postconditions:
' 1. Opens the drawing document.
' 2. Sets the system option to display
'    changed dimensions in the color selected
'    for Tools > Options > System Options >
'    Colors > Color scheme settings >
'    Drawings, Changed dimensions.
' 3. Saves and closes the drawing document.
' 4. Opens the part document of the drawing document.
' 5. Changes a dimension.
' 6. Saves and closes the part document.
' 7. Opens the previously saved drawing document.
' 8. Examine the drawing document to verify that
'    the changed dimension is displayed in the
'    changed-dimension color. Place your cursor over
'    the dimension to see its previous value.
'-------------------------------------------------------
Imports SolidWorks.Interop.sldworks
Imports SolidWorks.Interop.swconst
Imports System

Partial Class SolidWorksMacro

    Public Sub Main()

        Dim swModel As ModelDoc2
        Dim swModelDocExt As ModelDocExtension
        Dim swDrawing As DrawingDoc
        Dim fileName As String
        Dim saveFileName As String
        Dim errors As Long
        Dim warnings As Long
        Dim status As Boolean

        ' Open drawing document
        fileName = "install_dir\samples\tutorial\api\box.slddrw"
        swModel = swApp.OpenDoc6(fileName, swDocumentTypes_e.swDocDRAWING, swOpenDocOptions_e.swOpenDocOptions_Silent, "", errors, warnings)

        ' Isolate changed dimensions
        ' Equivalent to selecting Tools > Options > System Options > Colors >
        ' Use specified color for changed drawing dimensions on open
        swApp.SetUserPreferenceToggle(swUserPreferenceToggle_e.swUseChangedDimensions, True)
        swDrawing = swModel
        swDrawing.IsolateChangedDimensions()

        ' Save drawing document to another name
        saveFileName = "install_dir\samples\tutorial\api\box_changed.slddrw"
        swModelDocExt = swModel.Extension
        status = swModelDocExt.SaveAs(saveFileName, swSaveAsVersion_e.swSaveAsCurrentVersion, swSaveAsOptions_e.swSaveAsOptions_Silent, Nothing, errors, warnings)
        swApp.CloseDoc(saveFileName)

        ' Open the part document referenced by the drawing document,
        ' change a dimension, and save the document
        fileName = "install_dir\samples\tutorial\api\box.sldprt"
        swModel = swApp.OpenDoc6(fileName, swDocumentTypes_e.swDocPART, swOpenDocOptions_e.swOpenDocOptions_Silent, "", errors, warnings)
        swModelDocExt = swModel.Extension
        status = swModelDocExt.SelectByID2("Sketch1", "SKETCH", 0, 0, 0, True, 0, Nothing, 0)
        status = swModelDocExt.SelectByID2("D2@Sketch1@box.SLDPRT", "DIMENSION", -0.03613329319351, -0.02215939491444, 0.02938582119709, True, 0, Nothing, 0)
        Dim swDimension As Dimension
        swDimension = swModel.Parameter("D2@Sketch1")
        swDimension.SystemValue = 0.185
        swModel.ClearSelection2(True)
        status = swModel.EditRebuild3()
        status = swModel.Save3(swSaveAsOptions_e.swSaveAsOptions_Silent, errors, warnings)
        swApp.CloseDoc(fileName)

        ' Open the previously saved drawing document
        ' and place your cursor on the changed dimension,
        ' which displays in the color specified for
        ' changed dimensions, to see its previous value
        swModel = swApp.OpenDoc6(saveFileName, swDocumentTypes_e.swDocDRAWING, swOpenDocOptions_e.swOpenDocOptions_Silent, "", errors, warnings)
    End Sub


    ''' <summary>
    ''' The SldWorks swApp variable is pre-assigned for you.
    ''' </summary>
    Public swApp As SldWorks


End Class