scroll bar

I

Irina

Hi

I have developed a report, that shows sales statistics per several sales companies in a graph
Only a single company is displayed at a time

In order to navigate between sales companies (i.e., to draw a "new" graph) I am using list box and scroll bar
Time to time I experience the following scroll bar's beahviour
when clicking left or right scrollbar button, scrollbar runs suddenly thought several values by itself

It looks like if I would press a button and hold it for a while, and then release it.
However, the only thing I do is a single click

What could be the reason for such bahaviour

Thank you in advance for your replies.
 
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