diff --git a/Cargo.lock b/Cargo.lock
index f7d1147..f2fa182 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -286,6 +286,15 @@ dependencies = [
  "cmake",
 ]
 
+[[package]]
+name = "fltk-theme"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3539d27a815514b56af2afa6b8e7c6d6b9274a103239487d5a60daa6340a4868"
+dependencies = [
+ "fltk",
+]
+
 [[package]]
 name = "fluid-parser"
 version = "0.1.15"
@@ -1127,6 +1136,7 @@ dependencies = [
  "chrono",
  "fl2rust",
  "fltk",
+ "fltk-theme",
  "lazy_static",
  "libsqlite3-sys",
  "log",
diff --git a/Cargo.toml b/Cargo.toml
index 5427552..a79e345 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 anyhow = "^1.0.86"
 fltk = { version = "^1.4", features = ["fltk-bundled"] }
+fltk-theme = "0.7.2"
 calamine = "0.25.0"
 serialport = "4.4.0"
 rusqlite = "0.25.4"
@@ -21,3 +22,8 @@ serde_json="1.0.120"
 
 [build-dependencies]
 fl2rust = "0.5.19"
+
+[package.metadata.windows]
+# For windows subsystem
+link-args = ["/SUBSYSTEM:windows", "/ENTRY:mainCRTStartup"]
+subsystem = "windows"
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index a3cedd8..aa7326f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,12 +1,13 @@
 use fltk::{*};
-
 use crate::services::ui_service::UiService;
-
+use fltk_theme::{WidgetTheme, ThemeType};
 mod services;
 mod models;
 mod ui;
 fn main() {
     let app = app::App::default();
+    let widget_theme = WidgetTheme::new(ThemeType::Metro);
+    widget_theme.apply();
     let mut ui_service = UiService::new();
     ui_service.init_components();
     app.run().unwrap();
diff --git a/src/services/ui_service.rs b/src/services/ui_service.rs
index cc3fe1e..24d5d9c 100644
--- a/src/services/ui_service.rs
+++ b/src/services/ui_service.rs
@@ -2,8 +2,7 @@ use std::cell::RefCell;
 use std::process;
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
-
-use fltk::prelude::{DisplayExt, InputExt, WidgetExt};
+use fltk::prelude::{DisplayExt, InputExt, MenuExt, WidgetExt};
 use fltk::text::TextBuffer;
 
 use crate::services::log_service::LOGGER;
@@ -26,6 +25,10 @@ impl UiService {
         let work_service_clone = Rc::clone(&work_service_rc);
         let current_com;
         let should_current_line;
+        let comports = WorkService::get_port_names();
+        for com in comports {
+            ui.borrow_mut().com_choice.add_choice(&com);
+        }
 
         {
             let work_service = work_service_clone.borrow_mut();
@@ -36,7 +39,8 @@ impl UiService {
         if work_service_rc.borrow().config_model.excel_path != "" {
             ui.borrow_mut().excel_file_textbox.set_value(&work_service_rc.borrow().config_model.excel_path);
             ui.borrow_mut().current_line_textbox.set_value(&work_service_rc.borrow().config_model.current_line.to_string());
-            ui.borrow_mut().com_textbox.set_value(&*current_com.clone());
+            let index = ui.borrow().com_choice.find_index(&current_com);
+            ui.borrow_mut().com_choice.set_value(index);
 
             work_service_rc.borrow_mut().excel_service.as_mut().unwrap().set_current_line(should_current_line).unwrap();
         }
@@ -54,13 +58,26 @@ impl UiService {
         self.init_start_btn();
         self.init_set_line_btn();
         self.init_log();
-        self.init_exit_callback()
+        self.init_refresh_com_button();
+        self.init_exit_callback();
     }
 
-    fn init_exit_callback(&mut self){
+    fn init_refresh_com_button(&mut self) {
+        let ui_rc = Rc::clone(&self.ui);
+        let ui_rc_clone = Rc::clone(&ui_rc);
+        ui_rc.borrow_mut().refresh_com_btn.set_callback(move |_| {
+            let comports = WorkService::get_port_names();
+            let mut ui = ui_rc_clone.borrow_mut();
+            ui.com_choice.clear();
+            for com in comports {
+                ui.com_choice.add_choice(&com);
+            }
+        });
+    }
+    fn init_exit_callback(&mut self) {
         let ui_rc = Rc::clone(&self.ui);
         let work_service_rc = Rc::clone(&self.work_service);
-        ui_rc.borrow_mut().main_window.set_callback(move |_|{
+        ui_rc.borrow_mut().main_window.set_callback(move |_| {
             let work_service = work_service_rc.borrow_mut();
             work_service.save_config();
             process::exit(0);
@@ -79,7 +96,7 @@ impl UiService {
                 if let Ok(line) = set_dialog.line_textbox.value().parse::<usize>() {
                     match work_service_rc_clone.borrow_mut().set_current_line(line) {
                         Ok(_) => {
-                            ui_clone.borrow_mut().current_line_textbox.set_value(&line.to_string())
+                            ui_clone.borrow_mut().current_line_textbox.set_value(&line.to_string());
                         }
                         Err(msg) => fltk::dialog::message_default(&msg)
                     }
@@ -107,7 +124,7 @@ impl UiService {
                 }
                 Some(_) => {}
             }
-            let selected_com = ui.com_textbox.value();
+            let selected_com = ui.com_choice.choice().unwrap();
             if let Err(msg) = work_service.init_serial_service(selected_com) {
                 fltk::dialog::message_default(&msg);
                 return;
@@ -121,7 +138,8 @@ impl UiService {
                     }
                     Err(msg) => {
                         work_service.roll_back();
-                        fltk::dialog::message_default(&msg) }
+                        fltk::dialog::message_default(&msg)
+                    }
                 }
             }
         });
@@ -129,10 +147,6 @@ impl UiService {
 
     fn init_log(&mut self) {
         let ui_rc = Rc::clone(&self.ui);
-        if self.work_service.borrow_mut().config_model.last_com != ""{
-            ui_rc.borrow_mut().com_textbox.set_value(&self.work_service.borrow_mut().config_model.last_com);
-        }
-
         let text_buffer = TextBuffer::default();
         ui_rc.borrow_mut().log_content.set_buffer(text_buffer.clone());
         let text_buffer_arc = Arc::new(Mutex::new(text_buffer));
@@ -153,6 +167,7 @@ impl UiService {
             dialog.show();
             let binding = dialog.filename();
             let path = binding.to_str().unwrap();
+            if path == "" {return;}
             work_service.init_excel_service(path.to_string()).unwrap();
             let current_line = &work_service.get_current_line().to_string();
             work_service.config_model.excel_path = path.to_string();
diff --git a/src/ui/main.fl b/src/ui/main.fl
index 6f99c7e..f59af52 100644
--- a/src/ui/main.fl
+++ b/src/ui/main.fl
@@ -2,8 +2,10 @@
 version 1.0400
 header_name {.h}
 code_name {.cxx}
-class UserInterface {} {
-  Function {make_window()} {} {
+class UserInterface {open
+} {
+  Function {make_window()} {open
+  } {
     Fl_Window main_window {
       label WriteTool_RS open
       xywh {721 399 693 467} type Double visible
@@ -30,24 +32,28 @@ class UserInterface {} {
       }
       Fl_Button start_btn {
         label Start
-        xywh {445 155 240 35} shortcut 0xff0d color 51 labeltype ENGRAVED_LABEL labelsize 18
+        xywh {532 156 138 35} shortcut 0xff0d color 51 labeltype ENGRAVED_LABEL labelsize 18
       }
-      Fl_Text_Display log_content {
+      Fl_Text_Display log_content {selected
         xywh {10 210 670 250}
       }
-      Fl_Input com_textbox {
-        label {COM:}
-        xywh {135 155 285 35}
+      Fl_Choice com_choice {
+        label {Com:} open
+        xywh {135 156 235 35} down_box BORDER_BOX
+      } {}
+      Fl_Button refresh_com_btn {
+        label Refresh
+        xywh {390 156 120 35}
       }
     }
   }
 }
 
-class UserInterface1 {open selected
+class UserInterface1 {open
 } {
   Function {make_set_line_window()} {} {
     Fl_Window {} {open
-      xywh {828 554 228 43} type Double visible
+      xywh {1171 275 228 43} type Double visible
     } {
       Fl_Input line_textbox {
         label {Line:}