Section 7. Installation
where wderr is a declared variable, status is the table name, and watchdogerrors
is the keyword for the watchdog error field.
Seven special variable names are used to access information about a table.
• EventCount
• EventEnd
• Output
• Record
• TableFull
• TableSize
• TimeStamp
Consult CRBasic Editor Help index topic DataTable access for complete
information.
The DataTableInformation table also include this information. See Info Tables
and Settings
(p. 527).
7.6.3.18 Programming to Use Signatures
Signatures help assure system integrity and security. The following resources
provide information on using signatures.
• Signature() instruction in Diagnostics
• RunSignature
(p. 548)
• ProgSignature (p. 548)
• OSSignature (p. 545)
• Security — Overview (p. 84)
Many signatures are recorded in the Status table, which is a type of data table.
Signatures recorded in the Status table can be copied to a variable using the
programming technique described in the Programming Access to Data Tables
(p.
167).
Once in variable form, signatures can be sampled as part of another data
table for archiving.
7.6.3.19 Functions (with a capital F)
A Function is a subroutine that returns only one value of any data type (p. 127).
Use a Function to create a custom CRBasic "Instruction." It is declared with
Function(). An example is a Function that returns a string containing the day of
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