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An MFC-based urban zip code entry procedures, adding its own special features. Write a dialog program based on MFC. Can be realized: 1) Click on the " Add" button to add the city name and zip code to the list box. Process, the need to determine whether the repeated and added a list of existing items. 2) Click the " Edit" button, the list box will change names as search keywords, modify its contents after postal code to find. 3) (Pro) Click " Output TXT" button, list box, all the cities and zip code to txt text output.