How to Detect that the Mouse is unmoved and button still pressed?
In Delphi, I've added a Scrollbar component (oriented vertical) to the right side of my form. I've added a Scrollbar OnChange event so I can change the view of the form and the position of the scrollbar thumb when the user clicks on the UpArrow or DownArrow button with his mouse, and this works fine. But the OnChange event only seems t...