Int B3 Fn 7C  - Zipkey - Restore Zipkey Context                            [U]

   AH = 7Ch
   BL = maximum number of characters for a city name
   BH = ZIPKEY state code for last city-name search, or FFh if none
   CX:DX = internal code returned by AH=7Bh

Return: CF set on error
   CF clear if successful
   AX destroyed

See Also: AH=7Bh