hid_enumerate_partial.c

        /* Make sure this device is of Setup Class "HIDClass" and has a
           driver bound to it. */
#define ENABLE_HIDCLASS_CHECK 1
#define ENABLE_FOR_LOOP 1
#if ENABLE_FOR_LOOP
        for (i = 0; ; i++) {
#else
        i = device_index;
#endif
            char driver_name[256];

            /* Populate devinfo_data. This function will return failure
               when there are no more interfaces left. */
            res = SetupDiEnumDeviceInfo(device_info_set, i, &devinfo_data);
            if (!res)
            {
                printf("failure on SetupDiEnumDeviceInfo()!\n");  
                goto cont;
            }
            printf("Getting driver of i: [%d] Instance: [%d] guid: [%d]", i, devinfo_data.DevInst, devinfo_data.ClassGuid); 

            res = SetupDiGetDeviceRegistryPropertyA(device_info_set, &devinfo_data,
                           SPDRP_CLASS, NULL, (PBYTE)driver_name, sizeof(driver_name), NULL);
            if (!res)
            {
                printf("failure on SetupDiGetDeviceRegistryPropertyA()!\n");
                goto cont;
            }

            printf(" Driver: %s\n", driver_name);

            #if ENABLE_HIDCLASS_CHECK
                #if ENABLE_FOR_LOOP
                    if (strcmp(driver_name, "HIDClass") == 0) {
                        res = SetupDiGetDeviceRegistryPropertyA(device_info_set, &devinfo_data,
                                   SPDRP_DRIVER, NULL, (PBYTE)driver_name, sizeof(driver_name), NULL);
                        if (res)
                            break;
                    }
                #else
                    if (strcmp(driver_name, "HIDClass") != 0) {
                        goto cont;
                    }
                #endif
            #endif
#if ENABLE_FOR_LOOP
        }
#endif