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copied!<p>It is relatively easy done with RAW Input API.</p> <p>Take a look at "<a href="http://web.archive.org/web/20150316093927/http://nicholas.piasecki.name/blog/2009/02/distinguishing-barcode-scanners-from-the-keyboard-in-winforms" rel="nofollow noreferrer">Distinguishing Barcode Scanners from the Keyboard in WinForms</a>"</p> <p>I have a program that reads 3 different USB scanners and redirects the input to 3 different "channels" for processing. The code is somewhat extensive, so I am not postin it here. If you wish, I can paste some chunks of it or send you the project in e-mail.</p> <p>As a clue are the imports:</p> <pre><code>#region Raw Input API [DllImport( "User32.dll" )] extern static uint GetRawInputDeviceList( IntPtr pRawInputDeviceList, ref uint uiNumDevices, uint cbSize ); [DllImport( "User32.dll" )] extern static uint GetRawInputDeviceInfo( IntPtr hDevice, uint uiCommand, IntPtr pData, ref uint pcbSize ); [DllImport( "User32.dll" )] extern static bool RegisterRawInputDevices( RAWINPUTDEVICE[ ] pRawInputDevice, uint uiNumDevices, uint cbSize ); [DllImport( "User32.dll" )] extern static uint GetRawInputData( IntPtr hRawInput, uint uiCommand, IntPtr pData, ref uint pcbSize, uint cbSizeHeader ); #endregion </code></pre> <p>After you add the <code>InputDevice</code> to your project, you can listen to events by:</p> <pre><code>// Create a new InputDevice object and register InputDevice KeyPressed event handler. input_dev = new InputDevice( Handle ); input_dev.KeyPressed += new InputDevice.DeviceEventHandler( m_KeyPressed ); </code></pre> <p>The event handler <code>m_KeyPressed</code> lets you to distinguish your devices through <code>e.Keyboard.SubClass</code></p> <pre><code>private void m_KeyPressed( object sender, InputDevice.KeyControlEventArgs e ) { // e.Keyboard.SubClass tells you where from the event came. // e.Keyboard.key gives you the input data. } </code></pre> <p>Hope to have helped.</p>

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