# Win XP USB Port? **URL:** \ **Category:** Ruby\ **Created:** [February 2, 2006, 12:17am UTC](https://www.ruby-forum.com/t/win-xp-usb-port/53345 "2006-02-02T00:17:15Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![ESRSBruecklmeier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e19b73/32.png) [@ESRSBruecklmeier](https://www.ruby-forum.com/u/ESRSBruecklmeier)\ **Post date:** [February 2, 2006, 12:17am UTC](https://www.ruby-forum.com/t/win-xp-usb-port/53345/1 "2006-02-02T00:17:15Z")
Good morning rubyists, has anyone ever tried to termiante a USB device on a Win XP system from ruby? best regard out of the ice eric. ---
**Author:** ![ESRSBruecklmeier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e19b73/32.png) [@ESRSBruecklmeier](https://www.ruby-forum.com/u/ESRSBruecklmeier)\ **Post date:** [February 2, 2006, 5:59am UTC](https://www.ruby-forum.com/t/win-xp-usb-port/53345/2 "2006-02-02T05:59:20Z")
How’s the weather down there? I haven’t tried, but it may be possible using the following technique. Let me know if you need more help doing any of the steps: 1. Using ruby dl, connect to setupapi.dll and kernel32.dll 2. Call the function CM\_Locate\_DevNode to get the device handle for the usb drive. 3. Call the function CM\_Request\_Device\_Eject to stop the usb device. You’ll need to do a google search of [microsoft.com](http://microsoft.com) for each of those functions to know how to call them. Dan ---
**Author:** ![ESRSBruecklmeier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e19b73/32.png) [@ESRSBruecklmeier](https://www.ruby-forum.com/u/ESRSBruecklmeier)\ **Post date:** [February 2, 2006, 4:06pm UTC](https://www.ruby-forum.com/t/win-xp-usb-port/53345/3 "2006-02-02T16:06:18Z")
On 2/1/06, E.-R. Bruecklmeier [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Dr. Eric-Roger Bruecklmeier > Electronics Engineer / Communications Officer > Neumayer Station Antarctica > 70°39’S 08°15’W I’m officially using you as a reference in my next “Ruby/Rails is Viable” defense : “They use in research on Antartica” – ---
**Author:** ![ESRSBruecklmeier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e19b73/32.png) [@ESRSBruecklmeier](https://www.ruby-forum.com/u/ESRSBruecklmeier)\ **Post date:** [February 2, 2006, 4:48pm UTC](https://www.ruby-forum.com/t/win-xp-usb-port/53345/4 "2006-02-02T16:48:43Z")
Peter F. schrieb: > I’m officially using you as a reference in my next “Ruby/Rails is Viable” > defense : > > “They use in research on Antartica” not yet and not until the problem with the USB device is solved :-/ eric. ---
**Author:** ![ESRSBruecklmeier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e19b73/32.png) [@ESRSBruecklmeier](https://www.ruby-forum.com/u/ESRSBruecklmeier)\ **Post date:** [February 2, 2006, 5:31pm UTC](https://www.ruby-forum.com/t/win-xp-usb-port/53345/5 "2006-02-02T17:31:10Z")
> not yet and not until the problem with the USB device is solved :-/ So how far have you got? Dan Amelang ---
**Author:** ![ESRSBruecklmeier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e19b73/32.png) [@ESRSBruecklmeier](https://www.ruby-forum.com/u/ESRSBruecklmeier)\ **Post date:** [February 2, 2006, 6:46pm UTC](https://www.ruby-forum.com/t/win-xp-usb-port/53345/6 "2006-02-02T18:46:51Z")
Quoting “E.-R. Bruecklmeier” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > Daniel A. schrieb: > > > > not yet and not until the problem with the USB device is solved > > > :-/ > > > So how far have you got? > > I’m still looking for a posibillity to switch of a USB device out > of ruby. That isn’t really a Ruby question so much as an “is there a library/API to do this and can I use it from Ruby?” question. (If the first answer is yes, the second answer is a qualified yes, though you might need to write a C extension.) What specific USB device are we talking about, and what do you mean by “switch off”? Is this something you already know how to do from another language? -mental ---
**Author:** ![ESRSBruecklmeier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e19b73/32.png) [@ESRSBruecklmeier](https://www.ruby-forum.com/u/ESRSBruecklmeier)\ **Post date:** [February 2, 2006, 5:40pm UTC](https://www.ruby-forum.com/t/win-xp-usb-port/53345/7 "2006-02-02T17:40:15Z")
Daniel A. schrieb: > > not yet and not until the problem with the USB device is solved :-/ > > So how far have you got? I’m still looking for a posibillity to switch of a USB device out of ruby. eric. ---
**Author:** ![ESRSBruecklmeier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e19b73/32.png) [@ESRSBruecklmeier](https://www.ruby-forum.com/u/ESRSBruecklmeier)\ **Post date:** [February 2, 2006, 10:36pm UTC](https://www.ruby-forum.com/t/win-xp-usb-port/53345/8 "2006-02-02T22:36:40Z")
Did you get my first reply that specified the functions you (likely) have to call? Dan Amelang