Initiates a scan.
Public Function ScanPage( _ ByVal ShowUI As Boolean _ ) As Integer
Set to True to specify the scanner should display its User Interface else False to request a scan without the UI.
Stays in state 5 for multipage scans, until CloseSource is called. May be used in environments without full support of events.
This method is different from the Scan method in that it will not reset the scan session capabilites without the use of the CloseSource method.