diff --git a/Package.mk b/Package.mk
index 53fd832..85f6b80 100644
--- a/Package.mk
+++ b/Package.mk
@@ -34,6 +34,7 @@ $(BUILD_DIR_ZIP)/mercury.zip:
 	$(V)mkdir -p $(BUILD_DIR_ZIP)/mercury/DEVICE
 	$(V)cp $(BUILD_DIR_64)/subprojects/capnhook/inject/inject.exe \
 		$(BUILD_DIR_64)/mercuryhook/mercuryhook.dll \
+		$(BUILD_DIR_64)/mercuryio/mercuryio.dll \
 		$(DIST_DIR)/mercury/segatools.ini \
 		$(DIST_DIR)/mercury/start.bat \
     	$(BUILD_DIR_ZIP)/mercury
diff --git a/dist/mercury/segatools.ini b/dist/mercury/segatools.ini
index fbb238c..9fc5bba 100644
--- a/dist/mercury/segatools.ini
+++ b/dist/mercury/segatools.ini
@@ -43,3 +43,10 @@ coin=0x24
 volup=0x26
 voldown=0x28
 
+[touch]
+; Enable or disable touch hook
+enable=1
+
+;[mercuryio]
+; Use mercuryio.dll
+;path=mercuryio.dll
\ No newline at end of file
diff --git a/mercuryhook/elisabeth.c b/mercuryhook/elisabeth.c
index 71c4a05..baac575 100644
--- a/mercuryhook/elisabeth.c
+++ b/mercuryhook/elisabeth.c
@@ -23,6 +23,7 @@ static void dll_hook_insert_hooks(HMODULE target);
 static FARPROC WINAPI my_GetProcAddress(HMODULE hModule, const char *name);
 static FARPROC (WINAPI *next_GetProcAddress)(HMODULE hModule, const char *name);
 static int my_USBIntLED_Init();
+static int my_USBIntLED_set();
 
 static const struct hook_symbol win32_hooks[] = {
     {
@@ -59,6 +60,10 @@ FARPROC WINAPI my_GetProcAddress(HMODULE hModule, const char *name)
         if (strcmp(name, "USBIntLED_Init") == 0) {
             result = (FARPROC) my_USBIntLED_Init;
         }
+
+        if (strcmp(name, "USBIntLED_set") == 0) {
+            result = (FARPROC) my_USBIntLED_set;
+        }
     }
 
     return result;
@@ -70,3 +75,10 @@ static int my_USBIntLED_Init()
     dprintf("Elisabeth: my_USBIntLED_Init hit!\n");
     return 1;
 }
+
+static int my_USBIntLED_set(int data1, struct led_data data2)
+{
+    assert(mercury_dll.set_leds != NULL);
+    mercury_dll.set_leds(data2);
+    return 1;
+}
diff --git a/mercuryhook/elisabeth.h b/mercuryhook/elisabeth.h
index 9692c34..41066fc 100644
--- a/mercuryhook/elisabeth.h
+++ b/mercuryhook/elisabeth.h
@@ -1,3 +1,8 @@
 #pragma once
 
+struct led_data {
+   DWORD unitCount;
+   uint8_t rgba[480 * 4];
+};
+
 HRESULT elisabeth_hook_init();
diff --git a/mercuryhook/mercury-dll.c b/mercuryhook/mercury-dll.c
index 19c183a..47d3eab 100644
--- a/mercuryhook/mercury-dll.c
+++ b/mercuryhook/mercury-dll.c
@@ -27,6 +27,9 @@ const struct dll_bind_sym mercury_dll_syms[] = {
     }, {
         .sym = "mercury_io_touch_start",
         .off = offsetof(struct mercury_dll, touch_start),
+    }, {
+        .sym = "mercury_io_touch_set_leds",
+        .off = offsetof(struct mercury_dll, set_leds),
     }
 };
 
diff --git a/mercuryhook/mercury-dll.h b/mercuryhook/mercury-dll.h
index 086fd92..fa27edb 100644
--- a/mercuryhook/mercury-dll.h
+++ b/mercuryhook/mercury-dll.h
@@ -3,6 +3,7 @@
 #include <windows.h>
 
 #include "mercuryio/mercuryio.h"
+#include "mercuryhook/elisabeth.h"
 
 struct mercury_dll {
     uint16_t api_version;
@@ -12,6 +13,7 @@ struct mercury_dll {
     void (*get_gamebtns)(uint8_t *gamebtn);
     HRESULT (*touch_init)(void);
     void (*touch_start)(mercury_io_touch_callback_t callback);
+    void (*set_leds)(struct led_data data);
 };
 
 struct mercury_dll_config {
diff --git a/mercuryhook/mercuryhook.def b/mercuryhook/mercuryhook.def
index b12bc79..32f33c1 100644
--- a/mercuryhook/mercuryhook.def
+++ b/mercuryhook/mercuryhook.def
@@ -16,5 +16,6 @@ EXPORTS
     mercury_io_get_opbtns
     mercury_io_touch_init
     mercury_io_touch_start
+    mercury_io_touch_set_leds
     mercury_io_init
     mercury_io_poll
diff --git a/mercuryio/mercuryio.c b/mercuryio/mercuryio.c
index 9ad755b..6d38ff1 100644
--- a/mercuryio/mercuryio.c
+++ b/mercuryio/mercuryio.c
@@ -6,6 +6,7 @@
 
 #include "mercuryio/mercuryio.h"
 #include "mercuryio/config.h"
+#include "mercuryhook/elisabeth.h"
 
 static unsigned int __stdcall mercury_io_touch_thread_proc(void *ctx);
 
@@ -90,6 +91,11 @@ void mercury_io_touch_start(mercury_io_touch_callback_t callback)
     );
 }
 
+void mercury_io_touch_set_leds(struct led_data data)
+{
+
+}
+
 static unsigned int __stdcall mercury_io_touch_thread_proc(void *ctx)
 {
     mercury_io_touch_callback_t callback;
diff --git a/mercuryio/mercuryio.def b/mercuryio/mercuryio.def
new file mode 100644
index 0000000..167d1cf
--- /dev/null
+++ b/mercuryio/mercuryio.def
@@ -0,0 +1,11 @@
+LIBRARY mercuryio
+
+EXPORTS
+   mercury_io_get_api_version
+   mercury_io_init
+   mercury_io_poll
+   mercury_io_get_opbtns
+   mercury_io_get_gamebtns
+   mercury_io_touch_init
+   mercury_io_touch_start
+   mercury_io_touch_set_leds
\ No newline at end of file
diff --git a/mercuryio/mercuryio.h b/mercuryio/mercuryio.h
index 2701ec4..1031698 100644
--- a/mercuryio/mercuryio.h
+++ b/mercuryio/mercuryio.h
@@ -4,6 +4,8 @@
 
 #include <stdint.h>
 
+#include "mercuryhook/elisabeth.h"
+
 enum {
     MERCURY_IO_OPBTN_TEST = 0x01,
     MERCURY_IO_OPBTN_SERVICE = 0x02,
@@ -64,3 +66,5 @@ void mercury_io_get_gamebtns(uint8_t *gamebtn);
 HRESULT mercury_io_touch_init(void);
 
 void mercury_io_touch_start(mercury_io_touch_callback_t callback);
+
+void mercury_io_touch_set_leds(struct led_data data);
diff --git a/mercuryio/meson.build b/mercuryio/meson.build
index 813958a..4e6c0eb 100644
--- a/mercuryio/meson.build
+++ b/mercuryio/meson.build
@@ -11,3 +11,12 @@ mercuryio_lib = static_library(
         'config.h',
     ],
 )
+
+shared_library(
+    'mercuryio',
+    name_prefix : '',
+    vs_module_defs : 'mercuryio.def',
+    link_with : [
+        mercuryio_lib,
+    ],
+)
\ No newline at end of file