diff --git a/libskt/Makefile.nmake b/libskt/Makefile.nmake
new file mode 100644
index 00000000..4df782dc
--- /dev/null
+++ b/libskt/Makefile.nmake
@@ -0,0 +1,50 @@
+###############################################################################
+# common
+###############################################################################
+#ARCH: linux/pi/android/ios/win
+LD	= link
+AR	= lib
+RM	= del
+
+###############################################################################
+# target and object
+###############################################################################
+LIBNAME		= libskt
+TGT_LIB_A	= $(LIBNAME).lib
+TGT_LIB_SO	= $(LIBNAME).dll
+TGT_UNIT_TEST	= test_$(LIBNAME).exe
+
+OBJS_LIB	= $(LIBNAME).obj
+OBJS_UNIT_TEST	= test_$(LIBNAME).obj
+
+###############################################################################
+# cflags and ldflags
+###############################################################################
+CFLAGS	= /Iinclude /I../libposix4win/ /I. 
+CFLAGS	= $(CFLAGS) /Od /W3 /Zi
+
+LDFLAGS	= /LIBPATH:../libposix4win/ /LIBPATH:./
+LIBS    = ws2_32.lib
+
+###############################################################################
+# target
+###############################################################################
+TGT	= $(TGT_LIB_A)  $(TGT_LIB_SO) $(TGT_UNIT_TEST)
+
+OBJS	= $(OBJS_LIB) $(OBJS_UNIT_TEST)
+
+all: $(TGT)
+
+$(TGT_LIB_A): $(OBJS_LIB)
+	$(AR) $(OBJS_LIB) $(LIBS) /o:$(TGT_LIB_A)
+
+$(TGT_LIB_SO): $(OBJS_LIB)
+	$(LD) $(LDFLAGS) /Dll $(OBJS_LIB) $(LIBS) /o:$(TGT_LIB_SO)
+
+$(TGT_UNIT_TEST): $(OBJS_UNIT_TEST)
+	$(CC) $(TGT_LIB_A) $(OBJS_UNIT_TEST) /o $(TGT_UNIT_TEST) /link $(LDFLAGS)
+
+clean:
+	$(RM) $(OBJS)
+	$(RM) $(TGT)
+	$(RM) $(TGT_LIB_SO)*
diff --git a/libskt/libskt.c b/libskt/libskt.c
index dc0714db..127a4408 100644
--- a/libskt/libskt.c
+++ b/libskt/libskt.c
@@ -24,19 +24,17 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
-#include <unistd.h>
 #include <errno.h>
-#ifndef __ANDROID__
+#if defined (__linux__) || defined (__CYGWIN__)
 #include <ifaddrs.h>
-#endif
 #include <netdb.h>
 #include <fcntl.h>
 #include <net/if.h>
 #include <sys/un.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
-#include <sys/epoll.h>
 #include <arpa/inet.h>
+#endif
 
 
 #define LISTEN_MAX_BACKLOG  (128)
@@ -51,14 +49,24 @@ static struct skt_connection *_skt_connect(int type,
     int domain = -1;
     int protocol = 0;
     struct sockaddr_in si;
+#if 0
     struct sockaddr_un su;
+#endif
     struct sockaddr *sa;
     size_t sa_len = 0;
     struct skt_connection *sc = NULL;
+#if defined (__WIN32__) || defined (WIN32) || defined (_MSC_VER)
+    WSADATA Ws;
+    if (WSAStartup(MAKEWORD(2,2), &Ws) != 0) {
+        printf("Init Windows Socket Failed\n");
+        return NULL;
+    }
+#endif
     if (type < 0 || strlen(host) == 0 || port >= 0xFFFF) {
         printf("invalid paraments\n");
         return NULL;
     }
+
     switch (type) {
     case SOCK_STREAM:
     case SOCK_DGRAM:
@@ -69,6 +77,7 @@ static struct skt_connection *_skt_connect(int type,
         sa = (struct sockaddr*)&si;
         sa_len = sizeof(si);
         break;
+#if 0
     case SOCK_SEQPACKET:
         snprintf(su.sun_path, sizeof(su.sun_path), "%s", host);
         su.sun_family = PF_UNIX;
@@ -76,6 +85,7 @@ static struct skt_connection *_skt_connect(int type,
         sa = (struct sockaddr*)&su;
         sa_len = sizeof(su);
         break;
+#endif
     default:
         printf("unknown socket type!\n");
         return NULL;
@@ -87,6 +97,7 @@ static struct skt_connection *_skt_connect(int type,
         printf("malloc failed!\n");
         return NULL;
     }
+
     sc->fd = socket(domain, type, protocol);
     if (-1 == sc->fd) {
         printf("socket: %s\n", strerror(errno));
@@ -134,8 +145,17 @@ struct skt_connection *skt_unix_connect(const char *host, uint16_t port)
 
 int skt_tcp_bind_listen(const char *host, uint16_t port)
 {
+    SOCKET fd;
     struct sockaddr_in si;
-    int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+#if defined (__WIN32__) || defined (WIN32) || defined (_MSC_VER)
+    WSADATA Ws;
+    if (WSAStartup(MAKEWORD(2,2), &Ws) != 0) {
+        printf("Init Windows Socket Failed\n");
+        return -1;
+    }
+#endif
+    fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+    //int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
     if (-1 == fd) {
         printf("socket failed: %s\n", strerror(errno));
         goto fail;
@@ -171,7 +191,13 @@ int skt_udp_bind(const char *host, uint16_t port)
 {
     int fd;
     struct sockaddr_in si;
-
+#if defined (__WIN32__) || defined (WIN32) || defined (_MSC_VER)
+    WSADATA Ws;
+    if (WSAStartup(MAKEWORD(2,2), &Ws) != 0) {
+        printf("Init Windows Socket Failed\n");
+        return NULL;
+    }
+#endif
     si.sin_family = AF_INET;
     si.sin_addr.s_addr = host ? inet_addr(host) : INADDR_ANY;
     si.sin_port = htons(port);
@@ -193,11 +219,16 @@ int skt_udp_bind(const char *host, uint16_t port)
     return fd;
 }
 
+#if defined (__linux__) || defined (__CYGWIN__)
 int skt_unix_bind_listen(const char *host, uint16_t port)
 {
     int fd;
     struct sockaddr_un su;
-
+    WSADATA Ws;
+    if (WSAStartup(MAKEWORD(2,2), &Ws) != 0) {
+        printf("Init Windows Socket Failed\n");
+        return NULL;
+    }
     su.sun_family = PF_UNIX;
     snprintf(su.sun_path, sizeof(su.sun_path), "%s", host);
     fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
@@ -220,6 +251,7 @@ int skt_unix_bind_listen(const char *host, uint16_t port)
     close(fd);
     return -1;
 }
+#endif
 
 int skt_accept(int fd, uint32_t *ip, uint16_t *port)
 {
@@ -241,12 +273,15 @@ void skt_close(int fd)
     close(fd);
 }
 
+#if defined (__linux__) || defined (__CYGWIN__)
 int skt_get_tcp_info(int fd, struct tcp_info *tcpi)
 {
     socklen_t len = sizeof(*tcpi);
     return getsockopt(fd, SOL_TCP, TCP_INFO, tcpi, &len);
 }
+#endif
 
+#if defined (__linux__) || defined (__CYGWIN__)
 int skt_get_local_list(skt_addr_list_t **al, int loopback)
 {
 #ifdef __ANDROID__
@@ -309,6 +344,7 @@ int skt_get_local_list(skt_addr_list_t **al, int loopback)
 #endif
     return 0;
 }
+#endif
 
 int skt_get_remote_addr_by_fd(int fd, struct skt_addr *addr)
 {
@@ -426,11 +462,11 @@ int skt_gethostbyname(skt_addr_list_t **al, const char *name)
 
     host = gethostbyname(name);
     if (NULL == host) {
-        herror("gethostbyname failed!\n");
+        printf("gethostbyname failed!\n");
         return -1;
     }
     if (host->h_addrtype != AF_INET && host->h_addrtype != AF_INET6) {
-        herror("addrtype error!\n");
+        printf("addrtype error!\n");
         return -1;
     }
 
@@ -461,6 +497,7 @@ int skt_gethostbyname(skt_addr_list_t **al, const char *name)
     return 0;
 }
 
+#if defined (__linux__) || defined (__CYGWIN__)
 int skt_get_local_info(void)
 {
     int fd;
@@ -472,7 +509,13 @@ int skt_get_local_info(void)
     char ip[32] = {0};
     char broadAddr[32] = {0};
     char subnetMask[32] = {0};
-
+#if defined (__WIN32__) || defined (WIN32) || defined (_MSC_VER)
+    WSADATA Ws;
+    if (WSAStartup(MAKEWORD(2,2), &Ws) != 0) {
+        printf("Init Windows Socket Failed\n");
+        return NULL;
+    }
+#endif
     if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
         perror("socket");
         close(fd);
@@ -553,9 +596,11 @@ int skt_get_local_info(void)
     close(fd);
     return 0;
 }
+#endif
 
 int skt_set_noblk(int fd, int enable)
 {
+#if defined (__linux__) || defined (__CYGWIN__)
     int flag;
     flag = fcntl(fd, F_GETFL);
     if (flag == -1) {
@@ -571,11 +616,13 @@ int skt_set_noblk(int fd, int enable)
         printf("fcntl: %s\n", strerror(errno));
         return -1;
     }
+#endif
     return 0;
 }
 
 int skt_set_block(int fd)
 {
+#if defined (__linux__) || defined (__CYGWIN__)
     int flag;
     flag = fcntl(fd, F_GETFL);
     if (flag == -1) {
@@ -587,12 +634,14 @@ int skt_set_block(int fd)
         printf("fcntl: %s\n", strerror(errno));
         return -1;
     }
+#endif
     return 0;
 }
 
 int skt_set_nonblock(int fd)
 {
     int flag;
+#if defined (__linux__) || defined (__CYGWIN__)
     flag = fcntl(fd, F_GETFL);
     if (flag == -1) {
         printf("fcntl: %s\n", strerror(errno));
@@ -603,6 +652,7 @@ int skt_set_nonblock(int fd)
         printf("fcntl: %s\n", strerror(errno));
         return -1;
     }
+#endif
     return 0;
 }
 int skt_set_reuse(int fd, int enable)
diff --git a/libskt/libskt.h b/libskt/libskt.h
index 9764fbbb..56bdc86d 100644
--- a/libskt/libskt.h
+++ b/libskt/libskt.h
@@ -25,18 +25,22 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdarg.h>
-#ifndef __ANDROID__
+#if defined (__linux__) || defined (__CYGWIN__)
+#include <unistd.h>
 #include <ifaddrs.h>
-#endif
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 #include <netdb.h>
+#elif defined (__WIN32__) || defined (WIN32) || defined (_MSC_VER)
+#include "libposix4win.h"
+#endif
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 #define MAX_ADDR_STRING (65)
+#define INET_ADDRSTRLEN 16
 
 //socket structs
 
diff --git a/libskt/test_libskt.c b/libskt/test_libskt.c
index 41a6f92b..5614c7e8 100644
--- a/libskt/test_libskt.c
+++ b/libskt/test_libskt.c
@@ -107,6 +107,7 @@ int tcp_client(const char *host, uint16_t port)
     printf("remote ip = %s, port = %d\n", str_ip, g_sc->remote.port);
     skt_set_tcp_keepalive(g_sc->fd, 1);
     memset(&tcpi, 0, sizeof(tcpi));
+#if defined (__linux__) || defined (__CYGWIN__)
     ret = skt_get_tcp_info(g_sc->fd, &tcpi);
     if (ret == 0) {
         printf("unrecovered=%u "
@@ -126,6 +127,7 @@ int tcp_client(const char *host, uint16_t port)
              tcpi.tcpi_snd_cwnd,
              tcpi.tcpi_total_retrans);  // Total retransmits for entire connection
     }
+#endif
     struct thread *thread = thread_create(tcp_client_thread, g_sc);
     if (!thread) {
         printf("thread_create failed!\n");
@@ -243,6 +245,7 @@ void domain_test()
 {
     void *p;
     char str[MAX_ADDR_STRING];
+#if defined (__linux__) || defined (__CYGWIN__)
     skt_addr_list_t *tmp;
     if (0 == skt_get_local_list(&tmp, 0)) {
         for (; tmp; tmp = tmp->next) {
@@ -250,6 +253,7 @@ void domain_test()
             printf("ip = %s port = %d\n", str, tmp->addr.port);
         }
     }
+#endif
 
     if (0 == skt_getaddrinfo(&tmp, "www.sina.com", "3478")) {
         for (; tmp; tmp = tmp->next) {