oDlg:close( < nResult > ) -> .T.

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 PARAMETER:

  <nResult>    Is the return code of the dialog. This value will be written
               to the instance variable ::nResult, which can then be
               checked to see how the dialog box was ended.  

 DESCRIPTION:

  The ::Close() method closes a dialog box and removes it from the screen.
  It is almost identical to the End() method
  Like the ::End() method does ::close() evaluate the ::bValid
  block, and cancel the shutdown if it returns FALSE