[Dev-C++] Possible bug? (fdopen and fgets)

[Tracid <tr...@za...>]

Hello.

I've got a little problem. If I use the fdopen function, and then I use 
fgets, the compiled program crashes*.
Example:

#include <stdio.h>
#include <winsock.h>
#include <windows.h>

#pragma comment (lib, "ws2_32")

int main(int argc, char *argv[])
{
    WSADATA wsaData;
    if (WSAStartup (MAKEWORD(1, 1), &wsaData) != 0) {
       printf ("[-] WSAStartup failed.\n");
       return (1);
    }

    int sockfd; 
    char buf[1024];
    FILE *in;

/* some stuff here, connection to server is successfull */

    in = fdopen (sockfd, "r"); /* in
    while (fgets(buf, sizeof(buf), in) != NULL) { /* and here the 
compiled program crashes* */

/* some other stuff */
------------------

Using cygwin, it works well.
*Crashes = Windows error reporting window appears, and program ends 
suddenly.

Is this problem caused by Dev-Cpp or the Windows sockets?

Thank you.

PS: I admit that I am quite a newbie at C programming, but I've tried a 
lot of different variations for this, but it still crashes....