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Fire Notifications for Background Processing Events Example (VBA)

This example shows how to fire notifications when background processing events occur:

Main module

'---------------------------------------------------------------------------
' Preconditions:
' 1. Create a form, UserForm1, that contains the following controls:
'    * CheckBox1 with caption, "Enable background processing and open drawing"
'    * CommandButton1 with caption, "Close after background processing end event fires"
' 2. Modify the path in UserForm1's code to point to a large drawing document
'    containing many parts.
' 3. Open the Task Manager, click the Processes tab, and click the
'    CPU column header to sort the processes in descending order.
' 4. Run this macro to show UserForm1.
'    a. Select Enable background processing and open drawing.
'       i.   Background processing is enabled for the application.
'       ii.  The specified drawing document opens.
'       iii. The background processing start event fires.
'    b. In Task Manager, observe that several sldbgproc.exe processes
'       are occupying most of the CPU.
'    c. After several seconds, observe that the sldbgproc.exe processes stop,
'       and the background processing end event fires.
'    d. Click Close after background processing end event fires.
'       UserForm1 unloads.
'
' Postconditions: Inspect the Immediate window for background processing
' event notifications.
'---------------------------------------------------------------------------

Option Explicit

Sub main()

     UserForm1.Show vbModeless

End Sub

UserForm1 Code

Option Explicit

Private WithEvents swApp As SldWorks.SldWorks

Private Sub CheckBox1_Click()

    Set swApp = Application.SldWorks
    swApp.EnableBackgroundProcessing = CheckBox1.Value
   

    Dim filePath As String
    filePath = "path_to_large_drawing"
    Dim docSpecification  As DocumentSpecification
    Set docSpecification = swApp.GetOpenDocSpec(filePath)
    docSpecification.Silent = True
   

    Dim swmodelDoc As ModelDoc2
    Set swmodelDoc = swApp.OpenDoc7(docSpecification)
    Dim swDrawingDoc As DrawingDoc
    Set swDrawingDoc = swmodelDoc
   

    ' Set document background processing to application setting
     swDrawingDoc.BackgroundProcessingOption = 2
End Sub

Private Function swApp_BackgroundProcessingStartNotify(ByVal filename As String) As Long
    Debug.Print "Background processing start event fired."
End Function

Private Function swApp_BackgroundProcessingEndNotify(ByVal filename As String) As Long
    Debug.Print "Background processing end event fired."
    swApp.EnableBackgroundProcessing = False
End Function

Private Sub CommandButton1_Click()
    Unload UserForm1
End Sub

 



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