title: RichTextBox & Disabling Mouse Scrolling
body: <p>I want to use the mouse middle button to clear a RichTextBox, but it also activates a mouse scrolling functionality similar to what you find in web broswers. When the vertical scrollbar is visible (there's enough data) and you press the middle button in the mouse a scrolling cursor appears and you can scroll up or down by moving the cursor up or down. How do I disable the mouse scrolling?</p>
  
  <p>Mouse scrolling seems to be a Windows (or mouse driver) feature, so how can I stop the MouseDown event (if the mouse middle button is pressed) from reaching whatever routine is responsible for the mouse scrolling?</p>