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4-1
Chapter 4
Special Features
Function and Control Key Support
The WDP Reader can also transmit key sequences for function, control, alt
(command and option keys on Macs), cursor and shift keys, for ease of use with the
many software packages using these keys for menus or commands.
When the WDP reader reads a Code 128 or Full-ASCII Code 39 (or the equivalent
two-character Code 39 sequences) bar code containing one of the control
characters in the table above, it transmits the appropriate key code(s) for the IBM
or Mac computer interface.
Function keys F1 through F10, and numeric-pad keys
Function keys F1 through F10, and numeric-pad keys (such as Left Arrow and
Del), are encoded by a single control character (or the equivalent two-character
Code 39 sequences) as shown in the table above.
For example, if the WDP Reader reads bar code data of SOH (ASCII 001 -- a
control-A), it will transmit an F1 key sequence to your computer.
Function keys F11 and F12
Function keys F11 and F12 require two characters to be paired to make these
functions keys. The F11 key is created by combining the Null Character (%U in
Code 39) and SOH ($A in Code 39). The F12 key is created by combining the
Null Character (%U in Code 39) and the STX ($B in Code 39).
SOH $A F1 F1
STX $B F2 F2
ETX $C F3 F3
EOT $D F4 F4
ENQ $E F5 F5
ACK $F F6 F6
BEL $G F7 F7
SO $N F8 F8
LF $J Numpad 5 Enter
CR $M Enter Return
SI $O F9 F9
DLE $P F10 Cmnd On
DC1 $Q Del Del
DC2 $R Insert Cmnd Off
DC3 $S Lft Arrow Lft Arrow
DC4 $T Rt Arrow Rt Arrow
NAK $U Dn Arrow Dn Arrow
SYN $V Up Arrow Up Arrow
VT $K Pg Up Pg Up
FF $L Pg Down Pg Down
ETB $W Home Home
CAN $X End End
EM $Y Shift ON Shift ON
SUB $Z Shift OFF Shift OFF
FS %B Control On Control On
GS %C Control Off Control Off
RS %D Alt On Option On
US %E Alt Off Option Off
FA or Code IBM Mac
C128 39 Key Key
FA or Code IBM Mac
C128 39 Key Key