illumination Brightness

Hi guys,

i am using MC36 Mobile Computer. i just want to ask how can i set the illumination Brightness ?

i tried to use the following code but it does not work.

scanner = new Scanner();

ScannerConfig config = new ScannerConfig();

config.readerParams.readerSpecific.imagerSpecific.illuminationBrightness = 1;

this.scanner.setConfig(config);