diff --git a/luprex/.gitignore b/luprex/.gitignore
index 28562f3b..306cfed6 100644
--- a/luprex/.gitignore
+++ b/luprex/.gitignore
@@ -13,6 +13,10 @@ luprex
 *.pdb
 *.so
 *.a
+*.lib
+*.ilk
+*.exp
+*.pdb
 
 obj/**
 .vscode/**
diff --git a/luprex/Makefile b/luprex/Makefile
index 70e0cdf7..55809680 100644
--- a/luprex/Makefile
+++ b/luprex/Makefile
@@ -6,6 +6,8 @@
 
 ifneq "" "$(findstring -linux-,$(MAKE_HOST))"
 	OS=linux
+else ifneq "" "$(VSINSTALLDIR)"
+	OS=visual
 else ifneq "" "$(findstring cmd.exe,$(COMSPEC))"
 	OS=mingw
 endif
@@ -23,81 +25,80 @@ $(info Building for $(OS)...)
 #######################################################################
 
 OBJ_ERIS=\
-	obj/eris/lapi.o \
-	obj/eris/lcode.o \
-	obj/eris/lctype.o \
-	obj/eris/ldebug.o \
-	obj/eris/ldo.o \
-	obj/eris/ldump.o \
-	obj/eris/lfunc.o \
-	obj/eris/lgc.o \
-	obj/eris/llex.o \
-	obj/eris/lmem.o \
-	obj/eris/lobject.o \
-	obj/eris/lopcodes.o \
-	obj/eris/lparser.o \
-	obj/eris/lstate.o \
-	obj/eris/lstring.o \
-	obj/eris/ltable.o \
-	obj/eris/ltm.o \
-	obj/eris/lundump.o \
-	obj/eris/lvm.o \
-	obj/eris/lzio.o \
-	obj/eris/lauxlib.o \
-	obj/eris/lbaselib.o \
-	obj/eris/lbitlib.o \
-	obj/eris/lcorolib.o \
-	obj/eris/ldblib.o \
-	obj/eris/liolib.o \
-	obj/eris/lmathlib.o \
-	obj/eris/loslib.o \
-	obj/eris/lstrlib.o \
-	obj/eris/ltablib.o \
-	obj/eris/loadlib.o \
-	obj/eris/linit.o \
-	obj/eris/eris.o \
+	obj/eris/lapi.obj \
+	obj/eris/lcode.obj \
+	obj/eris/lctype.obj \
+	obj/eris/ldebug.obj \
+	obj/eris/ldo.obj \
+	obj/eris/ldump.obj \
+	obj/eris/lfunc.obj \
+	obj/eris/lgc.obj \
+	obj/eris/llex.obj \
+	obj/eris/lmem.obj \
+	obj/eris/lobject.obj \
+	obj/eris/lopcodes.obj \
+	obj/eris/lparser.obj \
+	obj/eris/lstate.obj \
+	obj/eris/lstring.obj \
+	obj/eris/ltable.obj \
+	obj/eris/ltm.obj \
+	obj/eris/lundump.obj \
+	obj/eris/lvm.obj \
+	obj/eris/lzio.obj \
+	obj/eris/lauxlib.obj \
+	obj/eris/lbaselib.obj \
+	obj/eris/lbitlib.obj \
+	obj/eris/lcorolib.obj \
+	obj/eris/ldblib.obj \
+	obj/eris/liolib.obj \
+	obj/eris/lmathlib.obj \
+	obj/eris/loslib.obj \
+	obj/eris/lstrlib.obj \
+	obj/eris/ltablib.obj \
+	obj/eris/loadlib.obj \
+	obj/eris/linit.obj \
+	obj/eris/eris.obj \
 
 OBJ_CORE=\
-	obj/core/invocation.o\
-	obj/core/spookyv2.o\
-	obj/core/eng-malloc.o\
-	obj/core/debugcollector.o\
-	obj/core/drivenengine.o\
-	obj/core/util.o\
-	obj/core/luastack.o\
-	obj/core/traceback.o\
-	obj/core/planemap.o\
-	obj/core/pprint.o\
-	obj/core/luaconsole.o\
-	obj/core/idalloc.o\
-	obj/core/globaldb.o\
-	obj/core/sched.o\
-	obj/core/http.o\
-	obj/core/json.o\
-	obj/core/table.o\
-	obj/core/gui.o\
-	obj/core/luasnap.o\
-	obj/core/animqueue.o\
-	obj/core/streambuffer.o\
-	obj/core/source.o\
-	obj/core/world-core.o\
-	obj/core/world-accessor.o\
-	obj/core/world-difftab.o\
-	obj/core/world-diffxmit.o\
-	obj/core/world-pairtab.o\
-	obj/core/world-testing.o\
-	obj/core/textgame.o\
-	obj/core/lpxserver.o\
-	obj/core/lpxclient.o\
-	obj/core/eng-tests.o\
-	obj/core/printbuffer.o\
-	obj/core/serializelua.o\
+	obj/core/invocation.obj\
+	obj/core/spookyv2.obj\
+	obj/core/eng-malloc.obj\
+	obj/core/debugcollector.obj\
+	obj/core/drivenengine.obj\
+	obj/core/util.obj\
+	obj/core/luastack.obj\
+	obj/core/traceback.obj\
+	obj/core/planemap.obj\
+	obj/core/pprint.obj\
+	obj/core/luaconsole.obj\
+	obj/core/idalloc.obj\
+	obj/core/globaldb.obj\
+	obj/core/sched.obj\
+	obj/core/http.obj\
+	obj/core/json.obj\
+	obj/core/table.obj\
+	obj/core/gui.obj\
+	obj/core/luasnap.obj\
+	obj/core/animqueue.obj\
+	obj/core/streambuffer.obj\
+	obj/core/source.obj\
+	obj/core/world-core.obj\
+	obj/core/world-accessor.obj\
+	obj/core/world-difftab.obj\
+	obj/core/world-diffxmit.obj\
+	obj/core/world-pairtab.obj\
+	obj/core/world-testing.obj\
+	obj/core/textgame.obj\
+	obj/core/lpxserver.obj\
+	obj/core/lpxclient.obj\
+	obj/core/eng-tests.obj\
+	obj/core/printbuffer.obj\
+	obj/core/serializelua.obj\
 
 
 OBJ_DRV=\
-	obj/drv/drvutil.o\
-	obj/drv/sslutil.o\
-	obj/drv/driver-$(OS).o\
+	obj/drv/drvutil.obj\
+	obj/drv/sslutil.obj\
 
 
 #######################################################################
@@ -112,19 +113,19 @@ ifeq "$(OS)" "linux"
 OPT=-g -O0
 GPP=g++ -Wall -fvisibility=hidden $(OPT) -std=c++17 -MMD
 
-luprex: $(OBJ_DRV) luprexlib.so
-	$(GPP) -o $@ $(OBJ_DRV) -L./ext/openssl-linux -lssl -lcrypto -ldl
+luprex: $(OBJ_DRV) driver-linux.o luprexlib.so
+	$(GPP) -o $@ $(OBJ_DRV) driver-linux.o -L./ext/openssl-linux -lssl -lcrypto -ldl
 
 luprexlib.so: $(OBJ_ERIS) $(OBJ_CORE)
 	$(GPP) -export-dynamic -Wl,--no-allow-shlib-undefined -Wl,-z,defs -shared-o $@ $^
 
-obj/eris/%.o: ext/eris-master/src/%.c
+obj/eris/%.obj: ext/eris-master/src/%.c
 	$(GPP) -fPIC -DLUA_USE_APICHECK -DLUA_USE_POSIX -o $@ -c $<
 
-obj/core/%.o: cpp/core/%.cpp
+obj/core/%.obj: cpp/core/%.cpp
 	$(GPP) -fPIC -I./ext/eris-master/src -I./cpp/wrap -I./cpp/core -o $@ -c $<
 
-obj/drv/%.o: cpp/drv/%.cpp
+obj/drv/%.obj: cpp/drv/%.cpp
 	$(GPP) -I./ext -I./src/drv -o $@ -c $<
 
 endif
@@ -141,26 +142,67 @@ ifeq "$(OS)" "mingw"
 OPT=-g -O0
 GPP=g++ -Wall -fvisibility=hidden $(OPT) -std=c++17 -MMD
 
-luprex.exe: $(OBJ_DRV) luprexlib.dll
-	$(GPP) -o $@ $(OBJ_DRV) -L./ext/openssl-mingw -lssl -lcrypto -lws2_32 -lcrypt32 -lcryptui
+luprex.exe: $(OBJ_DRV) driver-windows.o luprexlib.dll
+	$(GPP) -o $@ $(OBJ_DRV) driver-windows.o -L./ext/openssl-mingw -lssl -lcrypto -lws2_32 -lcrypt32 -lcryptui
 	ext/cv2pdb.exe luprex.exe
 
 luprexlib.dll: $(OBJ_ERIS) $(OBJ_CORE)
 	$(GPP) -Wl,--no-allow-shlib-undefined -shared -o $@ $^
 	ext/cv2pdb.exe luprexlib.dll
 
-obj/eris/%.o: ext/eris-master/src/%.c
+obj/eris/%.obj: ext/eris-master/src/%.c
 	$(GPP) -fPIC -DLUA_USE_APICHECK -DLUA_COMPAT_ALL -o $@ -c $<
 
-obj/core/%.o: cpp/core/%.cpp
+obj/core/%.obj: cpp/core/%.cpp
 	$(GPP) -fPIC -I./ext/eris-master/src -I./cpp/wrap -I./cpp/core -o $@ -c $<
 
-obj/drv/%.o: cpp/drv/%.cpp
+obj/drv/%.obj: cpp/drv/%.cpp
 	$(GPP) -I./ext -I./src/drv -o $@ -c $<
 
 endif
 
 
+#######################################################################
+##
+## Make rules for visual
+##
+#######################################################################
+
+ifeq "$(OS)" "visual"
+
+OPT=/Od /Zi
+MMD=g++ -Wall -std=c++17 -MMD -E
+CL=CL $(OPT) /std:c++17 /EHsc /nologo /MD /TP /c
+LINK=CL $(OPT) /std:c++17 /EHsc /nologo
+OBJ_OS=obj/drv/driver-windows.obj
+LIB_SSL=ext/openssl-3.1.0/lib/visual/libcrypto.lib ext/openssl-3.1.0/lib/visual/libssl.lib
+LIB_WIN=ws2_32.lib crypt32.lib cryptui.lib user32.lib advapi32.lib
+
+all: luprex.exe luprexlib.dll luprexstatic.exe
+
+luprex.exe: luprexlib.dll $(OBJ_DRV) $(OBJ_OS)
+	$(LINK) /Fe: $@ $(OBJ_DRV) $(OBJ_OS) $(LIB_SSL) $(LIB_WIN) 
+
+luprexlib.dll: $(OBJ_ERIS) $(OBJ_CORE)
+	$(LINK) /LDd /Fe: $@ $^
+
+luprexstatic.exe: $(OBJ_DRV) $(OBJ_OS) $(OBJ_ERIS) $(OBJ_CORE)
+	$(LINK) /Fe: $@ $(OBJ_DRV) $(OBJ_OS) $(OBJ_ERIS) $(OBJ_CORE) $(LIB_SSL) $(LIB_WIN)
+
+obj/eris/%.obj: ext/eris-master/src/%.c
+	$(MMD) -DLUA_USE_APICHECK -DLUA_COMPAT_ALL -o $@d $<
+	$(CL) /DLUA_USE_APICHECK /DLUA_COMPAT_ALL /Fo: $@ $<
+
+obj/core/%.obj: cpp/core/%.cpp
+	$(MMD) -I./ext/eris-master/src -I./cpp/wrap -I./cpp/core -o $@d $<
+	$(CL) /I./ext/eris-master/src /I./cpp\wrap /I./cpp/core /Fo: $@ $<
+
+obj/drv/%.obj: cpp/drv/%.cpp
+	$(MMD) -I./ext/openssl-3.1.0/inc -I./src/drv -o $@d $<
+	$(CL) /I./ext/openssl-3.1.0/inc -I./src/drv /Fo: $@ $<
+
+endif
+
 
 #######################################################################
 ##
@@ -169,7 +211,7 @@ endif
 #######################################################################
 
 clean:
-	rm -f luprex luprex.exe luprex.so luprexlib.dll *.pdb obj/core/*.* obj/drv/*.* obj/eris/*.*
+	rm -f luprex luprex.exe luprexlib.so luprexlib.dll luprexstatic luprexstatic.exe *.pdb obj/core/*.* obj/drv/*.* obj/eris/*.*
 
 
 #######################################################################
@@ -178,7 +220,7 @@ clean:
 ##
 #######################################################################
 
--include $(OBJ_ERIS:%.o=%.d)
--include $(OBJ_CORE:%.o=%.d)
--include $(OBJ_DRV:%.o=%.d)
+-include $(OBJ_ERIS:%.obj=%.d)
+-include $(OBJ_CORE:%.obj=%.d)
+-include $(OBJ_DRV:%.obj=%.d)
 
diff --git a/luprex/cpp/core/util.cpp b/luprex/cpp/core/util.cpp
index e2ef05f0..1c15795e 100644
--- a/luprex/cpp/core/util.cpp
+++ b/luprex/cpp/core/util.cpp
@@ -14,14 +14,6 @@
 #include <charconv>
 
 
-#ifdef WIN32
-#endif
-
-#ifndef WIN32
-#include <time.h>
-#include <unistd.h>
-#endif
-
 namespace sv {
 
 bool case_insensitive_eq(string_view s1, string_view s2) {
diff --git a/luprex/cpp/drv/driver-mingw.cpp b/luprex/cpp/drv/driver-windows.cpp
similarity index 96%
rename from luprex/cpp/drv/driver-mingw.cpp
rename to luprex/cpp/drv/driver-windows.cpp
index 39911c07..4267167a 100644
--- a/luprex/cpp/drv/driver-mingw.cpp
+++ b/luprex/cpp/drv/driver-windows.cpp
@@ -279,10 +279,14 @@ static void ssl_load_certificate_authorities(SSL_CTX *ctx) {
 }
 
 static void call_init_engine_wrapper(EngineWrapper *w) {
-    HMODULE dll = LoadLibraryA(".\\luprex.dll");
-    assert(dll != nullptr);
+    HMODULE exe = GetModuleHandleA(NULL);
     using InitFn = void (*)(EngineWrapper *);
-    InitFn initfn = (InitFn)GetProcAddress(dll, "init_engine_wrapper");
+    InitFn initfn = (InitFn)GetProcAddress(exe, "init_engine_wrapper");
+    if (initfn == nullptr) {
+        HMODULE dll = LoadLibraryA(".\\luprexlib.dll");
+        assert(dll != nullptr);
+        initfn = (InitFn)GetProcAddress(dll, "init_engine_wrapper");
+    }
     assert(initfn != nullptr);
     initfn(w);
 }
diff --git a/luprex/cpp/drv/drvutil.cpp b/luprex/cpp/drv/drvutil.cpp
index 9b642328..ece2406a 100644
--- a/luprex/cpp/drv/drvutil.cpp
+++ b/luprex/cpp/drv/drvutil.cpp
@@ -10,6 +10,7 @@
 #include <iostream>
 
 #if defined(_WIN32)
+#include <windows.h>
 #include <profileapi.h>
 #elif defined(__linux__)
 #include <time.h>