获取USB设备的PID跟VID

获取插入的USB得PID跟VID，可以根据PID跟VID确定智能机的型号，然后安装对应的驱动。

using System;
using System.Runtime.InteropServices;
using System.Text;

namespace USB 
{    
    /// 

    /// SetupApi.dll的PInvoke
    /// 

    public partial class EZUSB
    {
        #region ENUM
        [Flags]
        private enum DIGCF
        {
            DIGCF_DEFAULT = 0x00000001
            DIGCF_PRESENT = 0x00000002
            DIGCF_ALLCLASSES = 0x00000004          // 设备安装类
            DIGCF_PROFILE = 0x00000008
            DIGCF_DEVICEINTERFACE = 0x00000010     // 设备接口类
        }
        #endregion

        #region STRUCT
        [StructLayout（LayoutKind.Sequential）]
        private struct SP_DEVINFO_DATA
        {
            public static readonly SP_DEVINFO_DATA Empty = new SP_DEVINFO_DATA（Marshal.SizeOf（typeof（SP_DEVINFO_DATA）））;
            public UInt32 cbSize;
            public Guid ClassGuid;
            public UInt32 DevInst;
            public IntPtr Reserved;

            private SP_DEVINFO_DATA（int size）
            {
                cbSize = （UInt32）size;
                ClassGuid = Guid.Empty;
                DevInst = 0;
                Reserved = IntPtr.Zero;
            }
        }

        [StructLayout（LayoutKind.Sequential）]
        private struct SP_DEVICE_INTERFACE_DATA
        {
            public static readonly SP_DEVICE_INTERFACE_DATA Empty = new SP_DEVICE_INTERFACE_DATA（Marshal.SizeOf（typeof（SP_DEVICE_INTERFACE_DATA）））;
            public UInt32 cbSize;
            public Guid InterfaceClassGuid;
            public UInt32 Flags;
            public UIntPtr Reserved;

            private SP_DEVICE_INTERFACE_DATA（int size）
            {
                cbSize = （uint）size;
                InterfaceClassGuid = Guid.Empty;
                Flags = 0;
                Reserved = UIntPtr.Zero;
            }
        }

        [StructLayout（LayoutKind.Sequential CharSet = CharSet.Auto）]
        private struct SP_DEVICE_INTERFACE_DETAIL_DATA
        {
            public UInt32 cbSize;
            [MarshalAs（UnmanagedType.ByValTStr SizeConst = 256）]
            public String DevicePath;
        }
        #endregion

        #region API
        #region SetupDiGetClassDevs
        [DllImport（“setupapi.dll“ CharSet = CharSet.Auto）]
        private static extern IntPtr SetupDiGetClassDevs（
            ref Guid ClassGuid
            [MarshalAs（UnmanagedType.LPTStr）] String Enumerator
            IntPtr hwndParent
            DIGCF Flags
            ）;        

        [DllImport（“setupapi.dll“ CharSet = CharSet.Auto）]
        private static extern IntPtr SetupDiGetClassDevs（
            IntPtr ClassGuid       // null 
            String Enumerator
            IntPtr hwndParent
            DIGCF Flags
            ）;
        #endregion

        #region SetupDiGetClassDevsEx
        [DllImport（“setupapi.dll“ CharSet = CharSet.Auto）]
        private static extern IntPtr SetupDiGetClassDevsEx（
          

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       7809  2013-11-27 11:44  GetUSBPidVid\SetupApi.cs

     文件       5309  2013-11-27 11:44  GetUSBPidVid\WDKVidPidQuery.cs

     目录          0  2013-11-27 11:44  GetUSBPidVid

----------- ---------  ---------- -----  ----

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