C Language Development Kit/Functions/ScannerOff

Description	Checks whether the scan-engine is off.
Syntax	int scanneroff(void);
Arguments	None
Returns	Zero when the scan-engine is on, a non zero positive integer when the scan-engine is off
Remarks	Laser terminals: The scan-engine is the part of the terminal that emits the laser beam and that processes variations in reflected laser light. When the laser beam is visible, the scan-engine is on, else it is off. The scan-engine is controlled by the function scannerpower(). Pen terminal DWT7133: The scan-engine is the part of the terminal that emits the LED light and that processes variations in reflected LED light. When the LED light is emitted, the scan-engine is on, else it is off. The scan-engine is controlled by the function scannerpower().
Example	// The following example shows how to implement 'continuous read' mode. #include "lib.h" #include <stdio.h> void main( void ) { char bcr_buf[42]; struct barcode code; code.min = 1; code.max = 41; code.text = bcr_buf; gotoxy( 0, 0); cursor( BLINKING ); for(;;) { if( !scanneroff()) { resetkey(); if( readbarcode( ) == OK ) { goodreadled( GREEN, 10); sound( TSTANDARD, VHIGH, SMEDIUM, SHIGH, 0); scannerpower( ON, 250); gotoxy( 0, 0); printf("%s", code.text); } } else scannerpower( ON, 250); } }