问来自C# C++的USB驱动程序

EN

        Guid classGuid = GUID_DEVINTERFACE_DFU; // Guid(0x3fe809ab, 0xfb91, 0x4cb5, 0xa6, 0x43, 0x69, 0x67, 0x0d, 0x52,0x36,0x6e)

        IntPtr hDevInfo = Win32.SetupDiGetClassDevs(ref classGuid, IntPtr.Zero, IntPtr.Zero, Win32.DIGCF_DEVICEINTERFACE | Win32.DIGCF_PRESENT);
        if (hDevInfo.ToInt32() == Win32.INVALID_HANDLE_VALUE)
        {
            Console.WriteLine("read hardware information error");
        }
        else
        {
            uint i = 0;
            SP_DEVINFO_DATA devInfoData = new SP_DEVINFO_DATA();
            devInfoData.classGuid = Guid.Empty;
            devInfoData.devInst = 0;
            devInfoData.reserved = IntPtr.Zero;

            bool result = Win32.SetupDiEnumDeviceInfo(hDevInfo, i, devInfoData);
            if (false == result)
            {
                int error = Marshal.GetLastWin32Error();
                if (error != Win32.ERROR_NO_MORE_ITEMS)
                    throw new Win32Exception(error);
            }

            SP_DEVICE_INTERFACE_DATA ifData = new SP_DEVICE_INTERFACE_DATA();
            ifData.cbSize = 50;
            ifData.Flags = 0;
            ifData.InterfaceClassGuid = Guid.Empty;
            ifData.Reserved = IntPtr.Zero;

            bool result2 = Win32.SetupDiEnumDeviceInterfaces(hDevInfo, IntPtr.Zero, ref classGuid, i, ref ifData);
            if(result2 == false)
            {
                int error = Marshal.GetLastWin32Error();
                if (error != Win32.ERROR_NO_MORE_ITEMS)
                    throw new Win32Exception(error);
            }
        }


[StructLayout(LayoutKind.Sequential)]
public class SP_DEVINFO_DATA
{
    public uint cbSize = (uint)Marshal.SizeOf(typeof(SP_DEVINFO_DATA));
    public Guid classGuid;
    public uint devInst;
    public IntPtr reserved;
};

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
public class SP_DEVICE_INTERFACE_DATA
{
    public uint cbSize = (uint)Marshal.SizeOf(typeof(SP_DEVICE_INTERFACE_DATA));
    public Guid InterfaceClassGuid;
    public uint Flags;
    public IntPtr Reserved;
}

public class Win32
{
    [DllImport("setupapi.dll", SetLastError = true)]
    public static extern IntPtr SetupDiGetClassDevs(ref Guid ClassGuid, IntPtr Enumerator, IntPtr hwndParent, uint Flags);   

    [DllImport("setupapi.dll", SetLastError = true)]
    public static extern Boolean SetupDiEnumDeviceInfo(IntPtr lpInfoSet, UInt32 dwIndex, SP_DEVINFO_DATA devInfoData);

    public const int DIGCF_PRESENT = 0x02;
    public const int DIGCF_DEVICEINTERFACE = 0x10;
    public const long ERROR_NO_MORE_ITEMS = 259L;
}

    GUID Guid=GUID_DFU;  // { 0x3fe809ab, 0xfb91, 0x4cb5, { 0xa6, 0x43, 0x69, 0x67, 0x0d, 0x52,0x36,0x6e } }
    HDEVINFO info = SetupDiGetClassDevs(&Guid, NULL, NULL, DIGCF_PRESENT | DIGCF_INTERFACEDEVICE);
    if (info!=INVALID_HANDLE_VALUE)  
    {
        SP_INTERFACE_DEVICE_DATA ifData;
        ifData.cbSize=sizeof(ifData);

        bool result = SetupDiEnumDeviceInterfaces(info, NULL, &Guid, devIndex, &ifData);
    }