Enable Background Processing When Opening Drawing Document (VB.NET)

If a drawing document takes more time to open via the SolidWorks API than it does interactively, then you might be able to open the drawing more efficiently in the SolidWorks API using ISldWorks::EnableBackgroundProcessing. Setting this property to true opens the drawing while processing the drawing views in a background process.

Because you cannot make changes to the drawing while the background process is running, you should use ISldWorks::EnableBackgroundProcessing with ISldWorks::IsBackgroundProcessingCompleted.

'---------------------------------------------------------------------------

' Preconditions: Specified drawing document exists.

'

' Postconditions: Specified drawing document opens.

'---------------------------------------------------------------------------

Imports SolidWorks.Interop.sldworks
Imports SolidWorks.Interop.swconst
Imports System
Imports System.Diagnostics

Partial Class SolidWorksMacro

    Public Sub main()

        Dim swDrawing As DrawingDoc
        Dim strFileName As String
        Dim longstatus As Long
        Dim longwarnings As Long

        strFileName = "c:\Program Files\SolidWorks Corp\SolidWorks\samples\tutorial\advdrawings\foodprocessor.slddrw"

        swApp.EnableBackgroundProcessing = True

        swDrawing = swApp.OpenDoc6(strFileName, 3, 0, "", longstatus, longwarnings)
        While (swApp.IsBackgroundProcessingCompleted(strFileName) = False)
            Debug.Print("Background processing ongoing...")
        End While

        swApp.EnableBackgroundProcessing = False
        swApp = Nothing

    End Sub

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


End Class