I am developing a C# .NET 2.0 application wherein I need to scan for an attached HID. How can this be done? Because it is a HID, Windows does not assign a COM port to it. I only need to programmatically determine if the device is attached. Thank you.
ADDITIONAL INFORMATION
When I connect the USB device to my computer two entries appear under Human Interface Devices in the Device Manager. Clicking into their Properties yields this information in their respective Details tabs:
HID-compliant device Device Instance Id: HID\VID_1795&PID_6004\7&2694D932&0&0000
USB Human Interface Device Device Instance Id: USB\VID_1795&PID_6004\B973000000EB0D00
In the WMI Code Creator select these options:
Namespace: root\WMI
Class: MSWmi_PnPInstanceNames
Select InstanceNames
from the Results box for the following code:
using System;
using System.Management;
using System.Windows.Forms;
namespace WMISample
{
public class MyWMIQuery
{
public static void Main()
{
try
{
ManagementObjectSearcher searcher =
new ManagementObjectSearcher("root\\WMI",
"SELECT * FROM MSWmi_PnPInstanceNames");
foreach (ManagementObject queryObj in searcher.Get())
{
Console.WriteLine("-----------------------------------");
Console.WriteLine("MSWmi_PnPInstanceNames instance");
Console.WriteLine("-----------------------------------");
Console.WriteLine("InstanceName: {0}", queryObj["InstanceName"]);
}
}
catch (ManagementException e)
{
MessageBox.Show("An error occurred while querying for WMI data: " + e.Message);
}
}
}
}