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| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version

## mouse-wheel-present

Arguments:

On Windows, this function returns true if and only if a mouse that has a wheel is installed. This function may be useful for an application that adds mouse-wheel methods to implement custom mouse-wheel behavior.

On GTK, `nil` is always returned because we have not found a way to determine whether there is a mouse wheel.

Copyright (c) 1998-2019, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.2 page.
Created 2012.5.30.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version