You export data from your database to a file using the DP4 Report Writer utility. As for a report, you set up a program that defines the table, fields, and conditions used to determine the output. These parameters are used to output information from your database to a file. If the information from the CUSTOMER table is exported using fixed length fields, it will appear in the format shown in Import Data.
For transferring data between two slightly different DP4 databases you may orefer to use the database unload and load utilities which use a simple, but private, text file format to describe the data in the file.