public static extern int curl_easy_setopt( SafeCurlHandle curl, int option, curl_ioctl_callback callback);
public static extern int curl_easy_setopt( SafeCurlHandle curl, int option, curl_ioctl_callback callback);
public static extern int curl_easy_setopt( SafeCurlHandle curl, int option, curl_ioctl_callback callback);
public static extern int curl_easy_setopt( SafeCurlHandle curl, int option, curl_ioctl_callback callback);