When I lock my XP taskbar at desktop, why there is a coloured line below it?

Question

When I unlock, the line below disappear. How to remove the line?

Answer 1

Read the above.  Good answer...I gave you a STAR, because I like short, concise, simple answers that just answer the question.

Answer 2

so you know its locked

Answer 3

It's for coloured people. And Jim is a dolt.