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Some programs (e.g. ms html help viewer) have zoom-in features that only seem to work when you mouse wheel scroll.

Is there a way to emulate mouse wheel scroll using the keyboard?

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up vote 5 down vote accepted

It's possible with AutoHotkey.

Try this script for instance: Using Keyboard Numpad as a Mouse. It uses the Numeric Pad to emulate a mouse. When on, NumPad+ and Numpad- emulates the mouse wheel.

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Mkey ( ) does the job quite well.

This is much easier than making AutoHotKey scripts. TIP: If scroll doesn't work after making "scroll hotkey" try to change default scroll speed setting from "1" to "2".

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(Assuming Windows): Check out AutoHotKey, it can remap the Mouse Wheel.

From the docs:

Mouse Wheel Hotkeys [Windows NT/2000/XP or later]

Hotkeys that fire upon turning the mouse wheel are supported via the key names WheelDown and WheelUp. WheelLeft and WheelRight are also supported in v1.0.48+, but have no effect on operating systems older than Windows Vista.

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this is the other way around: capturing when the real wheel is used on the mouse. – Snark Mar 14 '10 at 21:16
Good point, it was mostly just to show AHK is 'mouse wheel aware'. :) – Ƭᴇcʜιᴇ007 Mar 14 '10 at 21:22

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