Count no of files in dialog before deleting

I want to parse a Dlg.title to display "file" if one file selected or "files" if several.
How to modify this.?

Set dlg = DOpus.Dlg 
Dim cmdDelete
Dim txtNum
Set cmdDelete = DOpus.Create.Command()
dlg.window = DOpus.Listers(0)
dlg.message = "Delete File"

'If numfiles>1 Then
'	txtNum = " the file?"
'Else
'	txtNum = " the files?"
'End If

dlg.title = "Do You Want to Delete"' + txtNum
dlg.buttons = "OK|Delete without Recycling|Cancel"
ret = dlg.Show
If ret = 1 Then
	cmdDelete.RunCommand("Delete")
ElseIf ret = 2 Then
	cmdDelete.RunCommand("Delete NORECYCLE")
End If

The default script has an example of checking selected item count:

	If clickData.func.sourcetab.selected.count = 0 Then
		DOpus.Output "  (none)"
	Else
		...
	End If

Remember that folders may also be selected. selected gives you both the selected folders and files. You can also use selected_dirs and selected_files to get just the selected folders or files.

If you want to take your deleting to the next level this thread might provide some inspiration: