Engine.LaunchExternalViewer ( FilePath)
Launches an external file viewer.
Typically, you use this method to display test reports.
This method specifies the external viewer based on settings that you can edit when you call DisplayExternalViewerDialog. If the dialog box contains no settings that apply to the file, TestStand launches a viewer based on the file extension association defined for the operating system.
FilePath As String
[In] Specifies the pathname of the file to view.