WinFileOpenDialogMBS.Constructor

WinFileOpenDialogMBS.Results as WinShellItemArrayMBS

Dim d As WinFileOpenDialogMBS // your dialog
Dim items As WinShellItemArrayMBS = d.Results

Dim c As Integer = items.Count
For i As Integer = 0 To c-1
  Dim item As WinShellItemMBS = items.Item(i)
  
  Listbox1.AddRow item.NativePath
Next

This method can be used whether the selection consists of a single item or multiple items.

Result property can be called after the dialog has closed or during the handling of an OnFileOk event. Calling this method at any other time will fail.
Show must return a success code for a result to be available to Result/Results.

WinFileOpenDialogMBS.SelectedItems as WinShellItemArrayMBS

This method can be used for single item or multiple item selections. If the user has entered new text in the file name field, this can be a time-consuming operation. When the application calls this method, the application parses the text in the filename field. For example, if this is a network share, the operation could take some time. However, this operation will not block the UI, since the user should able to stop the operation, which will result in SelectedItems raising an exception).