ulOption (ULONG) - input

      Flag indicating the folder to query.

      Possible values are described in the following list:

      QC_FIRST

        Return the first open folder in the open-folder list. This value is specified on the class object if the passed object is not currently open.
      QC_LAST
        Return the last open folder.
      QC_NEXT
        Return the next open folder after Folder in the list.

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