Intermec Janus 2010 Reference Manual page 88

im_irl_a
The a position in the matrix is one of the following:
IM_NO_LENGTH
IM_LENGTH
IM_RANGE
If IM_LENGTH is specified in the a position, the actual length of the data
string is placed in the d position (and b and c are not used).
If IM_RANGE is specified in the a position, the data length must be within
the range of b and c (and d is not used).
Set any unused table entries to {IM_NO_LENGTH,0,0,0}.
The mask_string parameter sets up a data mask that received data must
match. mask_string can accept a string of constants or wildcard characters.
For example, use the string ### - #### to accept only phone numbers.
You can use one or more of these wildcard characters to define the mask:
#
@
?
NULL (CHR$(0))
OUT Parameter: You must allocate at least 256 bytes to the irl_string parameter.
The cmd_count returned will be 0 unless an abort command is passed to the
string. Refer to Chapter 5, "Advanced Programming," in the PSK Reference
Manual for more information.
The symbology parameter is one of the following constants:
IM_CODE_11
IM_CODE_16K
IM_CODE_39
IM_CODE_49
IM_CODE_93
IM_CODE_128
IM_CODABAR
3-48
Accept data of any length
Accept data with a specific length
Accept data within a length range
Numeric
Alpha
Alphanumeric printable
No mask
Code 11 bar code
Code 16K bar code
Code 39 bar code
Code 49 bar code
Code 93 bar code
Code 128 bar code
Codabar bar code