User`s guide

Contents lxix
part of the Data String parameters. The Escape character can be changed with the session option
ESC=c. See Set Session Parameters (function 9) for details.
When the Data String contains AID keys, the string includes characters up to, and including, the first
AID key encountered. The segment string and segment length are set internally to the proper values as
the segment is sent to the Host. Because some Host applications process AID keys differently, some
keystrokes in a subsequent segment could be lost. It is therefore required that you do not create a Data
String containing more than one AID key.
The characters that make up the host function key codes are part of the Data String and make up its
total length. This means that you must be careful when using host function key codes to not exceed the
maximum of 255 characters in the Data String. For example, if you need to send a string that contains
the Enter key (code @E), then the two bytes for the Enter code must be included in the Data Length
parameter.
The following table lists the host function keys and their corresponding codes. Please note that if a
character is used in the code, the case of the character is important.
Meaning Mnemonic 3270 5250
@ @@ X
Alt @A X
Alternate Cursor @$ X X
Attention @A@Q X X
Backspace @< X X
Backtab (Left Tab) @B X X
Clear @C X X
Cmd Function Key @A@Y X
Cursor Down @V X
Meaning Mnemonic 3270 5250
Cursor Left @L X
Cursor Right @Z X
Cursor Select @A@J X
Cursor Up @U X X
Delete @D X X
Dup @S@x X X
End @q X
Enter @E X X
Erase EOF @F X X
Erase Input @A@F X X
Field Exit @A@E X
Field Mark @S@y X X
Field - @A@- X
Field + @A@+ X
Help @H X