Metrologic Optimus S Programming Manual page 80

74 "C" Programming Guide For Optimus S/R
clr_kb
getchar
GetKeyClick
If successful, it returns 1.
Return
Otherwise, it returns 0.
See Also OSTimeDly
Purpose To clear the keyboard buffer.
void clr_kb (void);
Syntax
Example clr_kb();
Description This routine is automatically called by the system upon powering up the
terminal.
Return None
See Also getchar, kbhit
Purpose To read one character from the keyboard buffer and then remove it.
Syntax int getchar (void);
Example c = getchar();
if (c > 0) printf ("Key %d pressed",c);
else printf ("No key pressed");
This routine can be used with menu operation to detect a shortcut key being
Description
pressed.
Return If successful, it returns the character read from the keyboard buffer.
Otherwise, it returns 0 to indicate the keyboard buffer is already empty.
See Also clr_kb, kbhit
Purpose To get the current setting of key click.
Syntax int GetKeyClick (void);
state = GetKeyClick();
Example
Description The key click is set to be enabled by default, but it can be changed from the
System Menu or through programming.
Return If key click is enabled, it returns 1~5 to indicate different tones.
Otherwise, it returns 0.
See Also SetKeyClick