Update README.build.md

README.build.md

@@ -139,19 +139,21 @@ Building on Windows (MinGW)
 
    a) Add the following lines to C:\MinGW\include\winsock2.h:
    
-#if(_WIN32_WINNT >= 0x0600)
+   ```c
+   #if(_WIN32_WINNT >= 0x0600)
 
-typedef struct pollfd {
+   typedef struct pollfd {
 
-    SOCKET  fd;
-    SHORT   events;
-    SHORT   revents;
+       SOCKET  fd;
+       SHORT   events;
+       SHORT   revents;
 
-} WSAPOLLFD, *PWSAPOLLFD, FAR *LPWSAPOLLFD;
+   } WSAPOLLFD, *PWSAPOLLFD, FAR *LPWSAPOLLFD;
 
-WINSOCK_API_LINKAGE int WSAAPI WSAPoll(LPWSAPOLLFD fdArray, ULONG fds, INT timeout);
+   WINSOCK_API_LINKAGE int WSAAPI WSAPoll(LPWSAPOLLFD fdArray, ULONG fds, INT timeout);
 
-#endif // (_WIN32_WINNT >= 0x0600)
+   #endif // (_WIN32_WINNT >= 0x0600)
+   ```
 
    b) Create C:\MinGW\include\mstcpip.h and copy and paste the content from following link into it: