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    <p>USB Hardware communication popularly works one of three ways.</p> <ol> <li><p>Proprietary software talks to hardware via proprietary driver.</p></li> <li><p>Devices have a Serial emulation chip (e.g. <a href="http://www.ftdichip.com/FTProducts.htm#FT232R" rel="noreferrer">FTDI</a>) When you plug in the scale you just need to install the Virtual Comm Port drivers and the device shows up as a comm port on your system. Then it is as easy as using System.IO.Ports.SerialPort to talk to the device.</p></li> <li><p>The device implements a HID profile and will be available through your OS's HID system. I've used <a href="http://www.lvr.com/hidpage.htm" rel="noreferrer">this .NET HID</a> library on Windows to successfully talk with barcode scanners that implement HID. The HID library will send data to you from the hardware in chunks that you decipher based on the hardware you are talking to.</p></li> </ol> <p>With method 2 and 3 you will just need to find the data format for the scale that you are talking to. The scales that I have used send updates every second or so with the weight and other information shown on the hardware UI, such as if the load has stabilized or not.</p> <p>Looking at their discussion forums it looks like their scales use method 2 (<a href="http://ohaus.com/support/forum_messages.asp?topicid=584" rel="noreferrer"><a href="http://ohaus.com/support/forum_messages.asp?topicid=584" rel="noreferrer">http://ohaus.com/support/forum_messages.asp?topicid=584</a></a>) and that you need to Poll the scale by sending a "P\r\n" it will then respond with the characters that are shown on the display (<a href="http://ohaus.com/support/forum_messages.asp?topicid=802" rel="noreferrer"><a href="http://ohaus.com/support/forum_messages.asp?topicid=802" rel="noreferrer">http://ohaus.com/support/forum_messages.asp?topicid=802</a></a>).</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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