using System;

 using System.Runtime.InteropServices; 

 namespace GenericHid

 {

 	internal sealed partial class DeviceManagement

 	{

 		internal static class NativeMethods

 		{

 			///<summary >

 			// API declarations relating to device management (SetupDixxx and 

 			// RegisterDeviceNotification functions).   

 			/// </summary>

 			// from setupapi.h

 			internal const Int32 DIGCF_PRESENT = 2;

 			internal const Int32 DIGCF_DEVICEINTERFACE = 0X10;

 			internal struct SP_DEVICE_INTERFACE_DATA

 			{

 				internal Int32 cbSize;

 				internal Guid InterfaceClassGuid;

 				internal Int32 Flags;

 				internal IntPtr Reserved;

 			}

 			internal struct SP_DEVICE_INTERFACE_DETAIL_DATA

 			{

 				internal Int32 cbSize;

 				internal String DevicePath;

 			}

 			internal struct SP_DEVINFO_DATA

 			{

 				internal Int32 cbSize;

 				internal Guid ClassGuid;

 				internal Int32 DevInst;

 				internal Int32 Reserved;

 			}

 			[DllImport("setupapi.dll", SetLastError = true)]

 			internal static extern IntPtr SetupDiCreateDeviceInfoList(ref Guid ClassGuid, IntPtr hwndParent);

 			[DllImport("setupapi.dll", SetLastError = true)]

 			internal static extern Int32 SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);

 			[DllImport("setupapi.dll", SetLastError = true)]

 			internal static extern Boolean SetupDiEnumDeviceInterfaces(IntPtr DeviceInfoSet, IntPtr DeviceInfoData, ref Guid InterfaceClassGuid, Int32 MemberIndex, ref SP_DEVICE_INTERFACE_DATA DeviceInterfaceData);

 			[DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Auto)]

 			internal static extern IntPtr SetupDiGetClassDevs(ref Guid ClassGuid, IntPtr Enumerator, IntPtr hwndParent, Int32 Flags);

 			[DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Auto)]

 			internal static extern Boolean SetupDiGetDeviceInterfaceDetail(IntPtr DeviceInfoSet, ref SP_DEVICE_INTERFACE_DATA DeviceInterfaceData, IntPtr DeviceInterfaceDetailData, Int32 DeviceInterfaceDetailDataSize, ref Int32 RequiredSize, IntPtr DeviceInfoData);

 		}

 	}

 }