public IEnumerable<string> FindDevices(Guid guid, string vendorId, string productId)
{
var deviceInfoSet = IntPtr.Zero;
var deviceDetailData = IntPtr.Zero;
var devices = new List<string>();
try
{
deviceInfoSet = InteropSetupAPI.SetupDiGetClassDevs(ref guid, IntPtr.Zero, IntPtr.Zero,
(int)InteropSetupAPI.DIGCFFlags.DIGCF_DEVICEINTERFACE |
(int)InteropSetupAPI.DIGCFFlags.DIGCF_PRESENT);
var deviceInterfaceData = new InteropDevices.SP_DEVICE_INTERFACE_DATA();
deviceInterfaceData.cbSize = Marshal.SizeOf(deviceInterfaceData);
// find all the devices of the selected vendor/product ID
for (var i = 0; InteropSetupAPI.SetupDiEnumDeviceInterfaces(deviceInfoSet, IntPtr.Zero, ref guid, i, ref deviceInterfaceData); i++)
{
var devicePath = CheckDevice(deviceInterfaceData, deviceInfoSet, out deviceDetailData, vendorId, productId);
if (devicePath != null) { devices.Add(devicePath); }
}
return devices;
}
finally
{
if (deviceInfoSet != IntPtr.Zero)
InteropSetupAPI.SetupDiDestroyDeviceInfoList(deviceInfoSet);
if (deviceDetailData != IntPtr.Zero)
{
Marshal.FreeHGlobal(deviceDetailData);
}
}
}
public static extern Boolean SetupDiGetDeviceInterfaceDetail(IntPtr DeviceInfoSet, ref InteropDevices.SP_DEVICE_INTERFACE_DATA DeviceInterfaceData, IntPtr DeviceInterfaceDetailData, Int32 DeviceInterfaceDetailDataSize, ref Int32 RequiredSize, IntPtr DeviceInfoData);
public static extern Boolean SetupDiEnumDeviceInterfaces(IntPtr DeviceInfoSet, IntPtr DeviceInfoData, ref System.Guid InterfaceClassGuid, Int32 MemberIndex, ref InteropDevices.SP_DEVICE_INTERFACE_DATA DeviceInterfaceData);