win10系统 已知USB设备的PID和VID，如何枚举USB设备，然后打开，读写，最后关闭设备。

可以使用Windows API函数来实现枚举、打开、读写和关闭USB设备。

以下是示例代码：

#include <Windows.h>
#include <SetupAPI.h>
#include <devguid.h>
#include <iostream>

int main()
{
    // 枚举指定VID和PID的USB设备
    GUID guidDevInterface = GUID_DEVINTERFACE_USB_DEVICE;
    HDEVINFO hDevInfo = SetupDiGetClassDevs(&guidDevInterface, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
    if (hDevInfo == INVALID_HANDLE_VALUE)
    {
        std::cerr << "Failed to get device information set.\n";
        return 1;
    }

    SP_DEVINFO_DATA devInfoData = { 0 };
    devInfoData.cbSize = sizeof(SP_DEVINFO_DATA);

    DWORD dwMemberIndex = 0;
    BOOL bFoundDevice = FALSE;
    while (SetupDiEnumDeviceInfo(hDevInfo, dwMemberIndex, &devInfoData))
    {
        dwMemberIndex++;

        // 获取设备的硬件ID
        WCHAR szHardwareId[MAX_DEVICE_ID_LEN] = { 0 };
        if (SetupDiGetDeviceRegistryProperty(hDevInfo, &devInfoData, SPDRP_HARDWAREID, NULL, (BYTE*)szHardwareId,
            sizeof(szHardwareId), NULL))
        {
            if (wcsstr(szHardwareId, L"VID_XXXX&PID_XXXX") != NULL)
            {
                std::wcout << L"Found matching device with hardware ID: " << szHardwareId << std::endl;

                // 打开设备
                HANDLE hDevice = CreateFile(L"\\\\.\\USB#VID_XXXX&PID_XXXX#", GENERIC_READ | GENERIC_WRITE,
                    FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
                if (hDevice != INVALID_HANDLE_VALUE)
                {
                    std::cout << "Device opened successfully." << std::endl;

                    // 读写设备
                    DWORD dwBytesWritten = 0;
                    DWORD dwBytesRead = 0;
                    BYTE bufWrite[] = { 0x01 };
                    BYTE bufRead[64] = { 0 };
                    if (WriteFile(hDevice, bufWrite, sizeof(bufWrite), &dwBytesWritten, NULL) &&
                        ReadFile(hDevice, bufRead, sizeof(bufRead), &dwBytesRead, NULL))
                    {
                        std::cout << "Data written and read successfully." << std::endl;
                    }
                    else
                    {
                        std::cerr << "Failed to read/write data to device." << std::endl;
                    }

                    // 关闭设备
                    CloseHandle(hDevice);
                }
                else
                {
                    std::cerr << "Failed to open device." << std::endl;
                }

                bFoundDevice = TRUE;
                break;
            }
        }
    }

    if (!bFoundDevice)
    {
        std::cerr << "Matching device not found." << std::endl;
    }

    // 释放设备信息集合
    SetupDiDestroyDeviceInfoList(hDevInfo);

    return 0;
}

需要替换代码中的`VID_XXXX&PID_XXXX`为实际的VID和PID值。此外，需要在代码中添加相应的头文件和链接到相应的库文件。