public static IEnumerable <string> Enum()
{
var hIDGuid = NativeMethods.HIDGuid;
IntPtr desiredDevices = NativeMethods.SetupDiGetClassDevs(ref hIDGuid, null, IntPtr.Zero,
NativeMethods.DIGCF_DEVICEINTERFACE | NativeMethods.DIGCF_PRESENT);
try
{
var deviceData = new NativeMethods.DeviceInterfaceData();
deviceData.Size = Marshal.SizeOf(deviceData);
for (uint i = 0; true; i++)
{
if (!NativeMethods.SetupDiEnumDeviceInterfaces(desiredDevices, IntPtr.Zero, ref hIDGuid, i, ref deviceData))
{
Marshal.GetLastWin32Error();
yield break;
}
var path = GetDevicePath(desiredDevices, ref deviceData);
if (path != null)
{
yield return(path);
}
}
}
finally
{
NativeMethods.SetupDiDestroyDeviceInfoList(desiredDevices);
}
}
private static string?GetDevicePath(IntPtr hInfoSet, ref NativeMethods.DeviceInterfaceData oInterface)
{
uint nRequiredSize = 0;
// Get the device interface details
if (!NativeMethods.SetupDiGetDeviceInterfaceDetail(hInfoSet, ref oInterface, IntPtr.Zero, 0, ref nRequiredSize, IntPtr.Zero))
{
var oDetail = new NativeMethods.DeviceInterfaceDetailData();
oDetail.Size = Marshal.SizeOf(typeof(IntPtr)) == 8 ? 8 : 5;
if (NativeMethods.SetupDiGetDeviceInterfaceDetail(hInfoSet, ref oInterface, ref oDetail, nRequiredSize,
ref nRequiredSize, IntPtr.Zero))
{
return(oDetail.DevicePath);
}
}
return(null);
}
