已知PID和VID，如何使用WINUSB读取GUID

要使用WINUSB读取GUID，您需要执行以下步骤：

1. 打开设备

使用WinUsb_Initialize函数打开设备并获得设备句柄。您需要提供设备的PID和VID。

2. 获取GUID描述符

使用WinUsb_QueryDeviceInformation函数获取设备的GUID描述符。您需要指定GUID描述符的索引号。

3. 读取GUID

使用WinUsb_ReadPipe函数从设备中读取GUID。您需要指定读取的管道和缓冲区的大小。

以下是一个简单的代码示例，可帮助您开始使用WINUSB读取GUID：

#include <windows.h>
#include <winusb.h>
#include <setupapi.h>
#include <devguid.h>

#define GUID_INDEX 1
#define BUFFER_SIZE 16

int main()
{
    // 打开设备
    GUID guid;
    HDEVINFO hdevinfo = NULL;
    SP_DEVICE_INTERFACE_DATA interface_data;
    SP_DEVINFO_DATA devinfo_data;
    WINUSB_INTERFACE_HANDLE winusb_handle;
    BOOL result;

    // 获取设备信息
    hdevinfo = SetupDiGetClassDevs(&GUID_DEVCLASS_USB, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
    if (hdevinfo == INVALID_HANDLE_VALUE) {
        printf("Failed to get device info\n");
        return 1;
    }

    // 枚举设备
    interface_data.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
    result = SetupDiEnumDeviceInterfaces(hdevinfo, NULL, &GUID_DEVCLASS_USB, 0, &interface_data);
    if (!result) {
        printf("Failed to enum device interfaces\n");
        return 1;
    }

    // 获取设备路径
    DWORD required_size;
    result = SetupDiGetDeviceInterfaceDetail(hdevinfo, &interface_data, NULL, 0, &required_size, NULL);
    if (!result && GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
        printf("Failed to get device interface detail\n");
        return 1;
    }

    PSP_DEVICE_INTERFACE_DETAIL_DATA interface_detail_data;
    interface_detail_data = (PSP_DEVICE_INTERFACE_DETAIL_DATA)malloc(required_size);
    interface_detail_data->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
    result = SetupDiGetDeviceInterfaceDetail(hdevinfo, &interface_data, interface_detail_data, required_size, NULL, NULL);
    if (!result) {
        printf("Failed to get device interface detail\n");
        return 1;
    }

    // 打开 WinUSB 设备
    HANDLE device_handle = CreateFile(interface_detail_data->DevicePath, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
    if (device_handle == INVALID_HANDLE_VALUE) {
        printf("Failed to open device\n");
        return 1;
    }

    // 初始化 WinUSB
    result = WinUsb_Initialize(device_handle, &winusb_handle);
    if (!result) {
        printf("Failed to initialize WinUSB\n");
        CloseHandle(device_handle);
        return 1;
    }

    // 获取 GUID 描述符
    UCHAR guid_descriptor[BUFFER_SIZE];
    ULONG guid_descriptor_length = BUFFER_SIZE;
    result = WinUsb_QueryDeviceInformation(winusb_handle, DeviceUxdGuid, &guid_descriptor_length, guid_descriptor);
    if (!result) {
        printf("Failed to query GUID descriptor\n");
        WinUsb_Free(winusb_handle);
        CloseHandle(device_handle);
        return 1;
    }

    // 读取 GUID
    UCHAR guid_data[BUFFER_SIZE];
    ULONG guid_length = BUFFER_SIZE;
    result = WinUsb_ReadPipe(winusb_handle, 0x81, guid_data, guid_length, NULL, NULL);
    if (!result) {
        printf("Failed to read GUID\n");
        WinUsb_Free(winusb_handle);
        CloseHandle(device_handle);
        return 1;
    }

    // 关闭设备
    WinUsb_Free(winusb_handle);
    CloseHandle(device_handle);
    return 0;
}