DBCS conversion is an interactive function between you and the server in which you enter an alphanumeric entry. The server displays related DBCS words, and you choose which word to use.
The server determines which words are related to an alphanumeric entry by checking DBCS conversion dictionaries. The server checks two DBCS conversion dictionaries when performing DBCS conversion. It checks the first user-created dictionary named QUSRIGCDCT found when searching a user's library list. Then, it checks the server-supplied dictionary, QSYSIGCDCT, stored in the library QSYS. (QSYSIGCDCT contains only Japanese double-byte characters.) You can create other user dictionaries, and you can give them names other than QUSRIGCDCT, but the server only refers to the first user-created dictionary named QUSRIGCDCT found in your library list when performing DBCS conversion.
After checking the dictionaries, the server displays words related to the alphanumeric entry. You then position the cursor under the word of your choice, and press the Enter key. The server enters that word where the cursor was positioned when you began DBCS conversion.