How to install libcurl in Dev c++?

Question

I tried to install here but the following code does not compile:

#include <stdio.h>
#include <curl/curl.h>

int main( void )
{
   int a = 1, b, c;
   char post[1000];
   CURL *curl;
   CURLcode res;

   /* In windows, this will init the winsock stuff */
   curl_global_init( CURL_GLOBAL_ALL );

   /* get a curl handle */
   curl = curl_easy_init();
   if ( curl ) {
      // aqui é definido o formulario que recebera os dados da requisição (POST).
      curl_easy_setopt( curl, CURLOPT_URL, "http://127.0.0.1/triangulo.php" );

      while ( a > 0 ) {
         printf( "\nDigite os 3 lados do triangulo separados por espaco: " );
         scanf( "%d %d %d", &a, &b, &c );

         sprintf( post, "n1=%d&n2=%d&n3=%d", a, b, c ); //Aqui é definida as variaveis do POST

         curl_easy_setopt( curl, CURLOPT_POSTFIELDS, post );

         /* Perform the request, res will get the return code */
         res = curl_easy_perform( curl );

         if ( res != CURLE_OK ) // verifica se deu algum erro
            fprintf( stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror( res ) );

      }

      /* always cleanup */
      curl_easy_cleanup( curl );
   }
   curl_global_cleanup();
   return 0;
}

Errors pointed out by the compiler:

main. c:(.text+0xdc): Undefined Reference to __imp_curl_global_init' main.c:(.text+0xe5): undefined reference to __imp_curl_easy_init' main. c:(.text+0x124): Undefined Reference to __imp_curl_easy_setopt' main.c:(.text+0x1b9): undefined reference to __imp_curl_easy_setopt' main. c:(.text+0x1cc): Undefined Reference to __imp_curl_easy_perform' main.c:(.text+0x1ec): undefined reference to __imp_curl_easy_strerror' main. c:(.text+0x22f): Undefined Reference to __imp_curl_easy_cleanup' main.c:(.text+0x238): undefined reference to __imp_curl_global_cleanup' [error] Ld returned 1 Exit status

How I installed the libcurl:

I simply copied what was in his lib and pasted it into Dev C++ lib, copied what was in the includes, and also threw all the files into Dev C++ includes. I left the image above for you to have an idea. Did I install it right? Why are you making these mistakes? I have tested with more than one example code and always happen the same mistakes, I do not know what to do or try... already reinstalled the program several times to repeat the installation process in different ways and always gives the same errors when compiling...