diff --git a/.vs/MacManagerForTemPatch/v16/.suo b/.vs/MacManagerForTemPatch/v16/.suo
index 16e4d33..b81f29e 100644
Binary files a/.vs/MacManagerForTemPatch/v16/.suo and b/.vs/MacManagerForTemPatch/v16/.suo differ
diff --git a/Form1.Designer.cs b/Form1.Designer.cs
index 2041583..dca925e 100644
--- a/Form1.Designer.cs
+++ b/Form1.Designer.cs
@@ -40,10 +40,10 @@ namespace MacManagerForTemPatch
             this.columnHeader3 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
             this.columnHeader4 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
             this.groupBox2 = new System.Windows.Forms.GroupBox();
+            this.button_add_test = new System.Windows.Forms.Button();
             this.button_removeAll = new System.Windows.Forms.Button();
             this.button_save_csv = new System.Windows.Forms.Button();
             this.serialPort = new System.IO.Ports.SerialPort(this.components);
-            this.button_add_test = new System.Windows.Forms.Button();
             this.label_lastmac = new System.Windows.Forms.Label();
             this.groupBox1.SuspendLayout();
             this.groupBox2.SuspendLayout();
@@ -140,6 +140,16 @@ namespace MacManagerForTemPatch
             this.groupBox2.TabStop = false;
             this.groupBox2.Text = "관리";
             // 
+            // button_add_test
+            // 
+            this.button_add_test.Location = new System.Drawing.Point(564, 173);
+            this.button_add_test.Name = "button_add_test";
+            this.button_add_test.Size = new System.Drawing.Size(79, 40);
+            this.button_add_test.TabIndex = 4;
+            this.button_add_test.Text = "Test";
+            this.button_add_test.UseVisualStyleBackColor = true;
+            this.button_add_test.Click += new System.EventHandler(this.button_add_test_Click);
+            // 
             // button_removeAll
             // 
             this.button_removeAll.Location = new System.Drawing.Point(564, 20);
@@ -160,17 +170,6 @@ namespace MacManagerForTemPatch
             this.button_save_csv.UseVisualStyleBackColor = true;
             this.button_save_csv.Click += new System.EventHandler(this.button_save_csv_Click);
             // 
-            // button_add_test
-            // 
-            this.button_add_test.Location = new System.Drawing.Point(564, 173);
-            this.button_add_test.Name = "button_add_test";
-            this.button_add_test.Size = new System.Drawing.Size(79, 40);
-            this.button_add_test.TabIndex = 4;
-            this.button_add_test.Text = "Test";
-            this.button_add_test.UseVisualStyleBackColor = true;
-            this.button_add_test.Visible = false;
-            this.button_add_test.Click += new System.EventHandler(this.button_add_test_Click);
-            // 
             // label_lastmac
             // 
             this.label_lastmac.AutoSize = true;
diff --git a/Form1.cs b/Form1.cs
index b347703..07988d4 100644
--- a/Form1.cs
+++ b/Form1.cs
@@ -7,6 +7,7 @@ using System.Drawing;
 using System.IO;
 using System.IO.Ports;
 using System.Linq;
+using System.Runtime.InteropServices;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
@@ -30,7 +31,7 @@ namespace MacManagerForTemPatch
         {
             InitializeComponent();
             runTimeData = new StringCollection();
-            comboBox_comport.DataSource = SerialPort.GetPortNames();
+            //comboBox_comport.DataSource = SerialPort.GetPortNames();
 
             mSerial_Buff = new byte[4096];
             mSerial_Buff_idx = 0;
@@ -70,9 +71,60 @@ namespace MacManagerForTemPatch
                 }
             }
 
-            
+            GetSerialPort();
+
+        }
+
+        private void GetSerialPort()
+        {
+            //   comboBox_comport.DataSource = SerialPort.GetPortNames();
+
+            comboBox_comport.Items.Clear();
+
+            try
+            {
+                foreach (string str in SerialPort.GetPortNames())
+                {
+                    comboBox_comport.Items.Add(str);
+                }
+
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message);
+            }
 
         }
+        protected override void WndProc(ref Message m)
+        {
+            UInt32 WM_DEVICECHANGE = 0x0219;
+            UInt32 DBT_DEVTUP_VOLUME = 0x02;
+            UInt32 DBT_DEVICEARRIVAL = 0x8000;
+            UInt32 DBT_DEVICEREMOVECOMPLETE = 0x8004;
+
+            if ((m.Msg == WM_DEVICECHANGE) && (m.WParam.ToInt32() == DBT_DEVICEARRIVAL))//디바이스 연결
+            {
+                //int m_Count = 0;
+                int devType = Marshal.ReadInt32(m.LParam, 4);
+
+                if (devType == DBT_DEVTUP_VOLUME)
+                {
+                    GetSerialPort();
+                }
+            }
+
+            if ((m.Msg == WM_DEVICECHANGE) && (m.WParam.ToInt32() == DBT_DEVICEREMOVECOMPLETE))  //디바이스 연결 해제
+            {
+                int devType = Marshal.ReadInt32(m.LParam, 4);
+                if (devType == DBT_DEVTUP_VOLUME)
+                {
+                    GetSerialPort();
+                }
+            }
+
+            base.WndProc(ref m);
+        }
+
 
         private void button_save_csv_Click(object sender, EventArgs e)
         {
@@ -273,7 +325,7 @@ namespace MacManagerForTemPatch
             if (MessageBox.Show("저장이 완료되었습니다. 목록을 삭제할까요? ", "데이터 삭제", MessageBoxButtons.YesNo) == DialogResult.Yes)
             {
                 macList.Clear();
-                listView.Clear();
+                listView_maclist.Items.Clear();
 
                 Properties.Settings.Default.savedmaclist.Clear();
                 Properties.Settings.Default.Save();
diff --git a/bin/Debug/MacManagerForTemPatch.exe b/bin/Debug/MacManagerForTemPatch.exe
index aa05c6c..09fe6b2 100644
Binary files a/bin/Debug/MacManagerForTemPatch.exe and b/bin/Debug/MacManagerForTemPatch.exe differ
diff --git a/bin/Debug/MacManagerForTemPatch.pdb b/bin/Debug/MacManagerForTemPatch.pdb
index d0f8e77..fb29191 100644
Binary files a/bin/Debug/MacManagerForTemPatch.pdb and b/bin/Debug/MacManagerForTemPatch.pdb differ
diff --git a/obj/Debug/MacManagerForTemPatch.csproj.GenerateResource.cache b/obj/Debug/MacManagerForTemPatch.csproj.GenerateResource.cache
index 574ce23..2c79a1c 100644
Binary files a/obj/Debug/MacManagerForTemPatch.csproj.GenerateResource.cache and b/obj/Debug/MacManagerForTemPatch.csproj.GenerateResource.cache differ
diff --git a/obj/Debug/MacManagerForTemPatch.csprojAssemblyReference.cache b/obj/Debug/MacManagerForTemPatch.csprojAssemblyReference.cache
index 050502c..5485901 100644
Binary files a/obj/Debug/MacManagerForTemPatch.csprojAssemblyReference.cache and b/obj/Debug/MacManagerForTemPatch.csprojAssemblyReference.cache differ
diff --git a/obj/Debug/MacManagerForTemPatch.exe b/obj/Debug/MacManagerForTemPatch.exe
index aa05c6c..09fe6b2 100644
Binary files a/obj/Debug/MacManagerForTemPatch.exe and b/obj/Debug/MacManagerForTemPatch.exe differ
diff --git a/obj/Debug/MacManagerForTemPatch.pdb b/obj/Debug/MacManagerForTemPatch.pdb
index d0f8e77..fb29191 100644
Binary files a/obj/Debug/MacManagerForTemPatch.pdb and b/obj/Debug/MacManagerForTemPatch.pdb differ