why not just unplug the mouse/keyboard and leave the barcode reader plugged in the ps2?
Slán
~M

>I want to focus my system at all times because this system is a barcode reader and I need to focus the system at all times to be able to get or entered the data in this system. Or is it posible to connect the barcode reader wich is PS2 by the way in serial port so that I can disable the keyboard and mouse.