Controlling USB devices from C#

Miguel Gómez

Hi, every body!

I would want to know, if is there any manner to control an USB device ( a code bar reader, for example) connected to the PC, using C# code (or VB). I must be able, for example, to disable reading, an enable it again, depending on the bussiness logic, using C# or VB code.

Does such a class exist in the .NET Framework?

I sicerelly appreciate any help in this subject.

thank you

Mike

Maxim S. Shatskih

Write your own wrapper around CreateFile and DeviceIoControl, possibly
using pinvoke.

--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com

"Miguel Gómez" <mikegomez@telefonica.net> wrote in message
news:OZLyBHeLIHA.3940@TK2MSFTNGP05.phx.gbl...
Hi, every body!

I would want to know, if is there any manner to control an USB device ( a code
bar reader, for example) connected to the PC, using C# code (or VB). I must be
able, for example, to disable reading, an enable it again, depending on the
bussiness logic, using C# or VB code.

Does such a class exist in the .NET Framework?

I sicerelly appreciate any help in this subject.

thank you

Mike

Pavel A.

Hi, what do you mean by "disabling reading" ?
Do you want to enable the barcode reader from the app only
when it needs to scan, and keep it disabled at other times,
to avoid interference with keyboard input?

--PA

"Miguel Gómez" <mikegomez@telefonica.net> wrote in message news:OZLyBHeLIHA.3940@TK2MSFTNGP05.phx.gbl...
Hi, every body!

I would want to know, if is there any manner to control an USB device ( a code bar reader, for example) connected to the PC,
using C# code (or VB). I must be able, for example, to disable reading, an enable it again, depending on the bussiness logic,
using C# or VB code.

Does such a class exist in the .NET Framework?

I sicerelly appreciate any help in this subject.

thank you

Mike

Miguel Gómez

¡YES, Pavel!, That's exactly what I want to do.
Caan you help me, please?


"Pavel A." <pavel_a@NOwritemeNO.com> escribió en el mensaje
news:%23cbr4wrLIHA.484@TK2MSFTNGP06.phx.gbl...
> Hi, what do you mean by "disabling reading" ?
> Do you want to enable the barcode reader from the app only
> when it needs to scan, and keep it disabled at other times,
> to avoid interference with keyboard input?
>
> --PA
>
> "Miguel Gómez" <mikegomez@telefonica.net> wrote in message
> news:OZLyBHeLIHA.3940@TK2MSFTNGP05.phx.gbl...
> Hi, every body!
>
> I would want to know, if is there any manner to control an USB device ( a
> code bar reader, for example) connected to the PC, using C# code (or VB).
> I must be able, for example, to disable reading, an enable it again,
> depending on the bussiness logic, using C# or VB code.
>
> Does such a class exist in the .NET Framework?
>
> I sicerelly appreciate any help in this subject.
>
> thank you
>
> Mike
>