ActionScript 2.0 Language Reference - Adobe Help and Support

If your SWF file includes a version 2 component, use the version 2 components'
DepthManager class instead of the MovieClip.getNextHighestDepth() method, which is
used in this example.
See also
Button, ContextMenu, ContextMenuItem, MovieClip
mouseWheelEnabled
(TextField.mouseWheelEnabled property)
public mouseWheelEnabled : Boolean
A Boolean value that indicates whether Flash Player should automatically scroll multiline text
fields when the mouse pointer clicks a text field and the user rolls the mouse wheel. By
default, this value is true. This property is useful if you want to prevent mouse wheel
scrolling of text fields, or implement your own text field scrolling.
Availability: ActionScript 1.0; Flash Player 7
Example
The following example creates two text fields. The scrollable_txt field has the
mouseWheelEnabled property set to true, so scrollable_txt scrolls when you click the field
and roll the mouse wheel. The nonscrollable_txt field does not scroll if you click the field
and roll the mouse wheel.
var font_array:Array = TextField.getFontList().sort();
this.createTextField("scrollable_txt", this.getNextHighestDepth(), 10, 10,
240, 320);
scrollable_txt.border = true;
scrollable_txt.wordWrap = true;
scrollable_txt.multiline = true;
scrollable_txt.text = font_array.join("\n");
this.createTextField("nonscrollable_txt", this.getNextHighestDepth(), 260,
10, 240, 320);
nonscrollable_txt.border = true;
nonscrollable_txt.wordWrap = true;
nonscrollable_txt.multiline = true;
nonscrollable_txt.mouseWheelEnabled = false;
nonscrollable_txt.text = font_array.join("\n");
If your SWF file includes a version 2 component, use the version 2 components'
DepthManager class instead of the MovieClip.getNextHighestDepth() method, which is
used in this example.
TextField 1211