# Launching a commamd prompt window from .rbw application

**URL:** <https://www.ruby-forum.com/t/launching-a-commamd-prompt-window-from-rbw-application/184068>\
**Category:** Ruby\
**Created:** [February 24, 2010, 3:47pm UTC](https://www.ruby-forum.com/t/launching-a-commamd-prompt-window-from-rbw-application/184068 "2010-02-24T15:47:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![alexd](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/96bed5/32.png) [@alexd](https://www.ruby-forum.com/u/alexd)\
**Post date:** [February 24, 2010, 3:47pm UTC](https://www.ruby-forum.com/t/launching-a-commamd-prompt-window-from-rbw-application/184068/1 "2010-02-24T15:47:00Z")

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How can I launch a command prompt window from within a .rbw application?  
I’d like, under certain circumstances, to allow output and input via a  
command prompt window/terminal window, but I don’t want it launched at  
starupt, nor open all the time.

–Alex

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<div class="post-metadata">

**Author:** ![alexd](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/96bed5/32.png) [@alexd](https://www.ruby-forum.com/u/alexd)\
**Post date:** [February 25, 2010, 2:51pm UTC](https://www.ruby-forum.com/t/launching-a-commamd-prompt-window-from-rbw-application/184068/2 "2010-02-25T14:51:52Z")

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HAve a look at [http://whynotwiki.com/Ruby\_/\_Process\_management](http://whynotwiki.com/Ruby_/_Process_management)  
which points to [http://www.ruby-doc.org/ruby-1.9/classes/Open3.html](http://www.ruby-doc.org/ruby-1.9/classes/Open3.html)

Looks like the writer of the former was working on linux so there may  
be some gotchas on windows…

Cheers

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<div class="post-metadata">

**Author:** ![alexd](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/96bed5/32.png) [@alexd](https://www.ruby-forum.com/u/alexd)\
**Post date:** [February 25, 2010, 4:15pm UTC](https://www.ruby-forum.com/t/launching-a-commamd-prompt-window-from-rbw-application/184068/3 "2010-02-25T16:15:43Z")

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> How can I launch a command prompt window from within a .rbw application?  
> I’d like, under certain circumstances, to allow output and input via a  
> command prompt window/terminal window, but I don’t want it launched at  
> starupt, nor open all the time.

Looks like using system can do it

rubyw -e ‘system(“cmd”)’

-r