Using dialogs and windows
When used with .NET applications, a .NET parent form is normally used as the parent for dialogs and windows that are displayed from the Spel class instance.
But LabVIEW does not use .NET forms, so to display windows and dialogs from LabVIEW, use the ParentWindowHandle property.
Set it to the window handle of your VI. You can call the Windows API FindWindow method to get the window handle.
When using ParentWindowHandle, you must call Spel.ShowWindow without the Parent parameter.