CTRLCHAR: Returning a Non-Printable Control Character

CTRLCHAR(ctrl_char)

where:

ctrl_char

Is one of the following keywords.

• NUL returns a null character.
• SOH returns a start of heading character.
• STX returns a start of text character.
• ETX returns an end of text character.
• EOT returns an end of transmission character.
• ENQ returns an enquiry character.
• ACK returns an acknowledge character.
• BEL returns a bell or beep character.
• BS returns a backspace character.
• TAB or HT returns a horizontal tab character.
• LF returns a line feed character.
• VT returns a vertical tab character.
• FF returns a form feed (top of page) character.
• CR returns a carriage control character.
• SO returns a shift out character.
• SI returns a shift in character.
• DLE returns a data link escape character.
• DC1 or XON returns a device control 1 character.
• DC2 returns a device control 2 character.
• DC3 or XOFF returns a device control 3 character.
• DC4 returns a device control 4 character.
• NAK returns a negative acknowledge character.
• SYN returns a synchronous idle character.
• ETB returns an end of transmission block character.
• CAN returns a cancel character.
• EM returns an end of medium character.
• SUB returns a substitute character.
• ESC returns an escape, prefix, or altmode character.
• FS returns a file separator character.
• GS returns a group separator character.
• RS returns a record separator character.
• US returns a unit separator character.
• DEL returns a delete, rubout, or interrupt character.