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SET TYPEAHEAD
Set the size of the keyboard buffer
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Syntax
SET TYPEAHEAD TO <nKeyboardSize>
Arguments
TO <nKeyboardSize> specifies the number of keystrokes the keyboard
buffer can hold from a minimum of zero to a maximum of 4096. The
default size of the keyboard buffer is machine-dependent but 16 is the
minimum size.
Description
SET TYPEAHEAD defines the size of the CA-Clipper keyboard buffer that
caches keystrokes input directly by the user. SET TYPEAHEAD, however,
does not affect the number of characters that can be stuffed
programmatically using the KEYBOARD command. When executed, SET
TYPEAHEAD clears the keyboard buffer and sets the size to
<nKeyboardSize>.
When TYPEAHEAD is SET TO zero, keyboard polling is suspended. An
explicit request for keyboard input, however, will temporarily enable
the keyboard and read any pending keystrokes from the BIOS buffer.
Calling NEXTKEY() constitutes such an explicit request. NEXTKEY() reads
any pending keystrokes from the BIOS buffer and returns the INKEY()
value of the first keystroke read, or zero if no keystrokes are pending.
Files Library is CLIPPER.LIB.
See Also:
ALTD()
CLEAR TYPEAHEAD
INKEY()
KEYBOARD
NEXTKEY()
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