>Hi Elvir,
>
>You can also change the background color of the form momentarily to red or bright green to indicate an error condition. This should catch your users' peripheral vision.
>
>HTH!
>
>Alex
>
>
>>Hi there,
>>many of user input data into forms without oft looking onto screen ("blind input") and in most cases they don't see possible error onto screen (invalid value into fields ... etc), they looking just on keyboard.
>>I think that making some kind of lightshow with LED of NumLock and other flashing in short times could attract users attention that something is wrong and watch onto screen.
>>I know how to light up and of first two LED but I can't light up the LED of ScrollLock...
>>Is there anybody who knows !?
>>Thanks in advance ?

Maybe even flash it though a series of colors for a few seconds to really get their attention.