XS202304198481/DLL/SoftKey/SoftKey_Win.cs

using System;
using System.Runtime.InteropServices;

namespace NS_SoftKey_Win
{
	/// <summary>
	/// Class1 µÄժҪ˵Ã÷¡£
	/// </summary>
	public class Win32
	{
		public const int WM_DEVICECHANGE = 0x0219;
		public const int DBT_DEVICEARRIVAL = 0x8000, // systemdetected a new device
						   DBT_DEVICEREMOVECOMPLETE = 0x8004; // device is gone
		public const int DEVICE_NOTIFY_WINDOW_HANDLE = 0,
			DEVICE_NOTIFY_SERVICE_HANDLE = 1;
		public const int DBT_DEVTYP_DEVICEINTERFACE = 0x00000005; // deviceinterface class
		public static Guid GUID_DEVINTERFACE_USB_DEVICE    = new
			Guid("4D1E55B2-F16F-11CF-88CB-001111000030");

		[StructLayout(LayoutKind.Sequential)] public class DEV_BROADCAST_HDR
		{
			public int dbcc_size;
			public int dbcc_devicetype;
			public int dbcc_reserved;
		}
		[StructLayout(LayoutKind.Sequential)] public class
			DEV_BROADCAST_DEVICEINTERFACE
		{
			public int dbcc_size;
			public int dbcc_devicetype;
			public int dbcc_reserved;
			public Guid dbcc_classguid;
			public short dbcc_name;
		}

		[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
			public class DEV_BROADCAST_DEVICEINTERFACE1
		{
			public int dbcc_size;
			public int dbcc_devicetype;
			public int dbcc_reserved;
			[MarshalAs(UnmanagedType.ByValArray, ArraySubType=UnmanagedType.U1,
				SizeConst=16)] public byte [] dbcc_classguid;
			[MarshalAs(UnmanagedType.ByValArray, SizeConst=128)] public char []
				dbcc_name;
		}

		[DllImport("user32.dll", SetLastError=true)] public static extern
			IntPtr RegisterDeviceNotification( IntPtr hRecipient, IntPtr
			NotificationFilter, Int32 Flags);
		[DllImport("kernel32.dll")] public static extern int GetLastError();
	}
}