# multiple mice

**URL:** <https://psychtoolbox.discourse.group/t/multiple-mice/708>\
**Category:** Uncategorized\
**Created:** [April 25, 2005, 8:07pm UTC](https://psychtoolbox.discourse.group/t/multiple-mice/708 "2005-04-25T20:07:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![robkohr](https://avatars.discourse-cdn.com/v4/letter/r/f475e1/32.png) [@robkohr](https://psychtoolbox.discourse.group/u/robkohr)\
**Post date:** [April 25, 2005, 8:07pm UTC](https://psychtoolbox.discourse.group/t/multiple-mice/708/1 "2005-04-25T20:07:38Z")

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I have a laptop with a trackpad, but want to use an external mouse  
with getmouse. It recognizes 2 mice and exits saying that it can't  
handle multiple mice.  
  
On this page I made a simple workaround to have it ignore the fact  
that multiple mice exist:  
[http://en.wikibooks.org/wiki/Psychtoolbox:GetMouse\_AllowMultipleHack](http://en.wikibooks.org/wiki/Psychtoolbox:GetMouse_AllowMultipleHack)  
and it doesn't seem to cause any problems.  
  
Is it nessacary to check for multiple mice?  
  
Rob

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**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\
**Post date:** [June 17, 2005, 8:58pm UTC](https://psychtoolbox.discourse.group/t/multiple-mice/708/2 "2005-06-17T20:58:39Z")

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--- In [psychtoolbox@yahoogroups.com](mailto:psychtoolbox@yahoogroups.com), "robkohr" \<robkohr@g...\> wrote:  

> \>   
> \> I have a laptop with a trackpad, but want to use an external mouse  
> \> with getmouse. It recognizes 2 mice and exits saying that it can't  
> \> handle multiple mice.  
> \>   
> \> On this page I made a simple workaround to have it ignore the fact  
> \> that multiple mice exist:  
> \> [http://en.wikibooks.org/wiki/Psychtoolbox:GetMouse\_AllowMultipleHack](http://en.wikibooks.org/wiki/Psychtoolbox:GetMouse_AllowMultipleHack)  
> \> and it doesn't seem to cause any problems.  
> \>   
> \> Is it nessacary to check for multiple mice?  
> \>   
> \> Rob

Dear Rob,  
Thanks so much for posting this. I was about to give up on using an  
external mouse and then I  
found your posting.  
Best regards,  
Aaron Schurger  
Department of Psychology  
Princeton University