无法定位序数xx于动态链接库

刚编译完的libcurl.lib写了一个测试程序，编译无任何警告和错误，运行时出现这个错误，
不知道什么原因

#include
#include

int main(void)
{
#if 1
CURL *curl;
CURLcode res;

curl_global_init(CURL_GLOBAL_DEFAULT);

curl = curl_easy_init();
if (curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://www.baidu.com/");
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
    /* Perform the request, res will get the return code */
    res = curl_easy_perform(curl);
    /* Check for errors */
    if (res != CURLE_OK)
        fprintf(stderr, "curl_easy_perform() failed: %s\n",
            curl_easy_strerror(res));

    /* always cleanup */
    curl_easy_cleanup(curl);
}

curl_global_cleanup();

#endif

return 0;

}

把libcurl的dll放到你的exe目录