This example displays the feature tree page for Assembly Visualization using SOLIDWORKS API.

Assembly Visualization Feature Manager Tab
Assembly Visualization Feature Manager Tab
Dim swApp As SldWorks.SldWorks

Sub main()

    Set swApp = Application.SldWorks
        
    Dim swAssy As SldWorks.AssemblyDoc
    Set swAssy = TryGetActiveAssembly
    
    If Not swAssy Is Nothing Then
        swApp.RunCommand swCommands_VisualizationTool, ""
    Else
        MsgBox "Please open assembly"
    End If
    
End Sub

Function TryGetActiveAssembly() As SldWorks.AssemblyDoc
    
    Dim swModel As SldWorks.ModelDoc2
    
    Set swModel = swApp.ActiveDoc
    
    If Not swModel Is Nothing Then
        
        If swModel.GetType() = swDocumentTypes_e.swDocASSEMBLY Then
            Set TryGetActiveAssembly = swApp.ActiveDoc
        End If
        
    End If
    
End Function