- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
    ICDeviceBrowser *deviceBrowser = [[ICDeviceBrowser alloc] init];
    deviceBrowser.browsedDeviceTypeMask = ICDeviceLocationTypeMaskLocal|ICDeviceLocationTypeMaskRemote|ICDeviceTypeMaskScanner;
    deviceBrowser.delegate = self;
    [deviceBrowser start];
}

...

- (void)deviceBrowser:(ICDeviceBrowser *)browser didAddDevice:(ICDevice *)device moreComing:(BOOL)moreComing {
    NSLog(@"didAddDevice: %@", device.name);

    if ((myScanner == nil) && ((device.type & ICDeviceTypeMaskScanner) == ICDeviceTypeScanner)) {
        NSLog(@"Found a scanner: %@", device.name);
        myScanner = (ICScannerDevice*)device;
        myScanner.delegate = self;
    }
}

- (void)deviceBrowser:(ICDeviceBrowser *)browser didRemoveDevice:(ICDevice *)device moreGoing:(BOOL)moreGoing {

}

- (void)deviceDidBecomeReady:(ICDevice *)device {
    NSLog(@"scannerDeviceDidBecomeReady: %@", device.name);
}

- (void)scannerDeviceDidBecomeAvailable:(ICScannerDevice*)scanner; {
    NSLog(@"scannerDeviceDidBecomeAvailable: %@", scanner.name);
    [scanner requestOpenSession];
}

- (void)didRemoveDevice:(ICDevice *)device {
    NSLog(@"deviceBrowser:didRemoveDevice: %@", device.name);
}