diff --git a/reactos/dll/win32/winhttp/net.c b/reactos/dll/win32/winhttp/net.c
index 276d4d73622..2f7b35dfa49 100644
--- a/reactos/dll/win32/winhttp/net.c
+++ b/reactos/dll/win32/winhttp/net.c
@@ -134,6 +134,7 @@ MAKE_FUNCPTR( ERR_free_strings );
 MAKE_FUNCPTR( ERR_get_error );
 MAKE_FUNCPTR( ERR_error_string );
 MAKE_FUNCPTR( X509_STORE_CTX_get_ex_data );
+MAKE_FUNCPTR( X509_STORE_CTX_get_chain );
 MAKE_FUNCPTR( i2d_X509 );
 MAKE_FUNCPTR( sk_value );
 MAKE_FUNCPTR( sk_num );
@@ -374,13 +375,14 @@ static int netconn_secure_verify( int preverify_ok, X509_STORE_CTX *ctx )
         X509 *cert;
         int i;
         PCCERT_CONTEXT endCert = NULL;
+        struct stack_st *chain = (struct stack_st *)pX509_STORE_CTX_get_chain( ctx );
 
         ret = TRUE;
-        for (i = 0; ret && i < psk_num((struct stack_st *)ctx->chain); i++)
+        for (i = 0; ret && i < psk_num(chain); i++)
         {
             PCCERT_CONTEXT context;
 
-            cert = (X509 *)psk_value((struct stack_st *)ctx->chain, i);
+            cert = (X509 *)psk_value(chain, i);
             if ((context = X509_to_cert_context( cert )))
             {
                 if (i == 0)
@@ -488,6 +490,7 @@ BOOL netconn_init( netconn_t *conn, BOOL secure )
     LOAD_FUNCPTR( ERR_get_error );
     LOAD_FUNCPTR( ERR_error_string );
     LOAD_FUNCPTR( X509_STORE_CTX_get_ex_data );
+    LOAD_FUNCPTR( X509_STORE_CTX_get_chain );
     LOAD_FUNCPTR( i2d_X509 );
     LOAD_FUNCPTR( sk_value );
     LOAD_FUNCPTR( sk_num );
diff --git a/reactos/dll/win32/winhttp/request.c b/reactos/dll/win32/winhttp/request.c
index 80a1b572d4d..4bd411c097f 100644
--- a/reactos/dll/win32/winhttp/request.c
+++ b/reactos/dll/win32/winhttp/request.c
@@ -504,7 +504,7 @@ static WCHAR *build_request_path( request_t *request )
             sprintfW( ret, fmt, scheme, request->connect->hostname );
             if (request->connect->hostport)
             {
-                static const WCHAR colonFmt[] = { ':','%','d',0 };
+                static const WCHAR colonFmt[] = { ':','%','u',0 };
 
                 sprintfW( ret + strlenW( ret ), colonFmt,
                     request->connect->hostport );
@@ -870,7 +870,7 @@ static BOOL read_reply( request_t *request );
 static BOOL secure_proxy_connect( request_t *request )
 {
     static const WCHAR verbConnect[] = {'C','O','N','N','E','C','T',0};
-    static const WCHAR fmt[] = {'%','s',':','%','d',0};
+    static const WCHAR fmt[] = {'%','s',':','%','u',0};
     BOOL ret = FALSE;
     LPWSTR path;
     connect_t *connect = request->connect;
@@ -1837,7 +1837,7 @@ static BOOL receive_response( request_t *request, BOOL async )
 
         if (!(request->hdr.disable_flags & WINHTTP_DISABLE_COOKIES)) record_cookies( request );
 
-        if (status == 301 || status == 302)
+        if (status == HTTP_STATUS_MOVED || status == HTTP_STATUS_REDIRECT || status == HTTP_STATUS_REDIRECT_KEEP_VERB)
         {
             if (request->hdr.disable_flags & WINHTTP_DISABLE_REDIRECTS) break;
 
diff --git a/reactos/dll/win32/winhttp/url.c b/reactos/dll/win32/winhttp/url.c
index 09835b43c91..6ead33cbf27 100644
--- a/reactos/dll/win32/winhttp/url.c
+++ b/reactos/dll/win32/winhttp/url.c
@@ -299,7 +299,7 @@ static DWORD comp_length( DWORD len, DWORD flags, WCHAR *comp )
 
 static BOOL calc_length( URL_COMPONENTS *uc, DWORD flags, LPDWORD len )
 {
-    static const WCHAR formatW[] = {'%','d',0};
+    static const WCHAR formatW[] = {'%','u',0};
     INTERNET_SCHEME scheme;
 
     *len = 0;
@@ -360,7 +360,7 @@ static BOOL calc_length( URL_COMPONENTS *uc, DWORD flags, LPDWORD len )
  */
 BOOL WINAPI WinHttpCreateUrl( LPURL_COMPONENTS uc, DWORD flags, LPWSTR url, LPDWORD required )
 {
-    static const WCHAR formatW[] = {'%','d',0};
+    static const WCHAR formatW[] = {'%','u',0};
     static const WCHAR twoslashW[] = {'/','/'};
 
     DWORD len;
diff --git a/reactos/dll/win32/winhttp/winhttp_private.h b/reactos/dll/win32/winhttp/winhttp_private.h
index 5da3ae1d547..24440528308 100644
--- a/reactos/dll/win32/winhttp/winhttp_private.h
+++ b/reactos/dll/win32/winhttp/winhttp_private.h
@@ -204,38 +204,38 @@ typedef struct
     LPDWORD written;
 } write_data_t;
 
-object_header_t *addref_object( object_header_t * );
-object_header_t *grab_object( HINTERNET );
-void release_object( object_header_t * );
-HINTERNET alloc_handle( object_header_t * );
-BOOL free_handle( HINTERNET );
+object_header_t *addref_object( object_header_t * ) DECLSPEC_HIDDEN;
+object_header_t *grab_object( HINTERNET ) DECLSPEC_HIDDEN;
+void release_object( object_header_t * ) DECLSPEC_HIDDEN;
+HINTERNET alloc_handle( object_header_t * ) DECLSPEC_HIDDEN;
+BOOL free_handle( HINTERNET ) DECLSPEC_HIDDEN;
 
-void set_last_error( DWORD );
-DWORD get_last_error( void );
-void send_callback( object_header_t *, DWORD, LPVOID, DWORD );
-void close_connection( request_t * );
+void set_last_error( DWORD ) DECLSPEC_HIDDEN;
+DWORD get_last_error( void ) DECLSPEC_HIDDEN;
+void send_callback( object_header_t *, DWORD, LPVOID, DWORD ) DECLSPEC_HIDDEN;
+void close_connection( request_t * ) DECLSPEC_HIDDEN;
 
-BOOL netconn_close( netconn_t * );
-BOOL netconn_connect( netconn_t *, const struct sockaddr *, unsigned int, int );
-BOOL netconn_connected( netconn_t * );
-BOOL netconn_create( netconn_t *, int, int, int );
-BOOL netconn_get_next_line( netconn_t *, char *, DWORD * );
-BOOL netconn_init( netconn_t *, BOOL );
-void netconn_unload( void );
-BOOL netconn_query_data_available( netconn_t *, DWORD * );
-BOOL netconn_recv( netconn_t *, void *, size_t, int, int * );
-BOOL netconn_resolve( WCHAR *, INTERNET_PORT, struct sockaddr *, socklen_t *, int );
-BOOL netconn_secure_connect( netconn_t *, WCHAR * );
-BOOL netconn_send( netconn_t *, const void *, size_t, int, int * );
-DWORD netconn_set_timeout( netconn_t *, BOOL, int );
-const void *netconn_get_certificate( netconn_t * );
-int netconn_get_cipher_strength( netconn_t * );
+BOOL netconn_close( netconn_t * ) DECLSPEC_HIDDEN;
+BOOL netconn_connect( netconn_t *, const struct sockaddr *, unsigned int, int ) DECLSPEC_HIDDEN;
+BOOL netconn_connected( netconn_t * ) DECLSPEC_HIDDEN;
+BOOL netconn_create( netconn_t *, int, int, int ) DECLSPEC_HIDDEN;
+BOOL netconn_get_next_line( netconn_t *, char *, DWORD * ) DECLSPEC_HIDDEN;
+BOOL netconn_init( netconn_t *, BOOL ) DECLSPEC_HIDDEN;
+void netconn_unload( void ) DECLSPEC_HIDDEN;
+BOOL netconn_query_data_available( netconn_t *, DWORD * ) DECLSPEC_HIDDEN;
+BOOL netconn_recv( netconn_t *, void *, size_t, int, int * ) DECLSPEC_HIDDEN;
+BOOL netconn_resolve( WCHAR *, INTERNET_PORT, struct sockaddr *, socklen_t *, int ) DECLSPEC_HIDDEN;
+BOOL netconn_secure_connect( netconn_t *, WCHAR * ) DECLSPEC_HIDDEN;
+BOOL netconn_send( netconn_t *, const void *, size_t, int, int * ) DECLSPEC_HIDDEN;
+DWORD netconn_set_timeout( netconn_t *, BOOL, int ) DECLSPEC_HIDDEN;
+const void *netconn_get_certificate( netconn_t * ) DECLSPEC_HIDDEN;
+int netconn_get_cipher_strength( netconn_t * ) DECLSPEC_HIDDEN;
 
-BOOL set_cookies( request_t *, const WCHAR * );
-BOOL add_cookie_headers( request_t * );
-BOOL add_request_headers( request_t *, LPCWSTR, DWORD, DWORD );
-void delete_domain( domain_t * );
-BOOL set_server_for_hostname( connect_t *connect, LPCWSTR server, INTERNET_PORT port );
+BOOL set_cookies( request_t *, const WCHAR * ) DECLSPEC_HIDDEN;
+BOOL add_cookie_headers( request_t * ) DECLSPEC_HIDDEN;
+BOOL add_request_headers( request_t *, LPCWSTR, DWORD, DWORD ) DECLSPEC_HIDDEN;
+void delete_domain( domain_t * ) DECLSPEC_HIDDEN;
+BOOL set_server_for_hostname( connect_t *connect, LPCWSTR server, INTERNET_PORT port ) DECLSPEC_HIDDEN;
 
 static inline void *heap_alloc( SIZE_T size )
 {