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READKEY()*
Determine what key terminated a READ
------------------------------------------------------------------------------
Syntax
READKEY() --> nReadkeyCode
Returns
READKEY() returns a code representing the key pressed to exit a READ.
In CA-Clipper, the following keys are the standard READ exit keys and
their READKEY() return codes:
READKEY() Return Codes
------------------------------------------------------------------------
Exit Key Return Code
------------------------------------------------------------------------
Up arrow 5
Down arrow 2
PgUp 6
PgDn 7
Ctrl+PgUp 31
Ctrl+PgDn 30
Esc 12
Ctrl+End, Ctrl+W 14
Type past end 15
Return 15
------------------------------------------------------------------------
Description
READKEY() is a keyboard function that emulates the READKEY() function in
dBASE III PLUS. Its purpose is to determine what key the user pressed
to terminate a READ. If UPDATED() is true (.T.), READKEY() returns the
code plus 256. Up arrow and Down arrow exit a READ only if READEXIT()
returns true (.T.). The default value is false (.F.). To provide
complete compatibility for these keys, execute a READEXIT (.T.) at the
beginning of your main procedure.
READKEY() is supplied as a compatibility function and, therefore, its
use is strongly discouraged. It is superseded entirely by LASTKEY()
which determines the last keystroke fetched from the keyboard buffer.
If the keystroke was a READ exit key, LASTKEY() will return the INKEY()
code for that key. To determine whether any Get object's buffer was
modified during a READ, it is superseded by the UPDATED() function.
Files Library is EXTEND.LIB, source file is SOURCE\SAMPLE\READKEY.PRG
See Also:
@...GET
NEXTKEY()
READ
READEXIT()
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