diff --git a/networkPaint/MainForm.Designer.cs b/networkPaint/MainForm.Designer.cs
index c64b689..c4e9f67 100644
--- a/networkPaint/MainForm.Designer.cs
+++ b/networkPaint/MainForm.Designer.cs
@@ -48,7 +48,9 @@
             this.paintArea.Size = new System.Drawing.Size(640, 480);
             this.paintArea.TabIndex = 0;
             this.paintArea.TabStop = false;
-            this.paintArea.Click += new System.EventHandler(this.paintArea_Click);
+            this.paintArea.MouseDown += new System.Windows.Forms.MouseEventHandler(this.paintArea_MouseDown);
+            this.paintArea.MouseMove += new System.Windows.Forms.MouseEventHandler(this.paintArea_MouseMove);
+            this.paintArea.MouseUp += new System.Windows.Forms.MouseEventHandler(this.paintArea_MouseUp);
             // 
             // timer
             // 
diff --git a/networkPaint/MainForm.cs b/networkPaint/MainForm.cs
index 4d6574a..f2721cf 100644
--- a/networkPaint/MainForm.cs
+++ b/networkPaint/MainForm.cs
@@ -8,30 +8,44 @@ namespace networkPaint
 {
     public partial class MainForm : Form
     {
-        Color color;
         Random r = new Random();
         WebClient client = new WebClient();
-        Bitmap bitmap;
+        Bitmap bitmap = new Bitmap(640, 480);
         Graphics graphics;
+
+        Color color;
         string url = "http://kawaiizenbo.me/toys/networkpaint/";
+        bool dragging = false;
+
         public MainForm()
         {
             InitializeComponent();
             color = intToRGB(r.Next(0, 0xFFFFFF));
-            bitmap = new Bitmap(640, 480);
             paintArea.Image = bitmap;
             graphics = Graphics.FromImage(bitmap);
         }
 
-        private void paintArea_Click(object sender, EventArgs e)
+        private void paintArea_MouseUp(object sender, MouseEventArgs e)
         {
-            MouseEventArgs em = (MouseEventArgs)e;
-            NameValueCollection values = new NameValueCollection();
-            values["color"] = rgbToInt(color).ToString();
-            values["x"] = em.X.ToString();
-            values["y"] = em.Y.ToString();
-            values["size"] = brushSizeNumericUpDown.Value.ToString();
-            client.UploadValues(url + "post.php", values);
+            dragging = false;
+        }
+
+        private void paintArea_MouseDown(object sender, MouseEventArgs e)
+        {
+            dragging = true;
+        }
+
+        private void paintArea_MouseMove(object sender, MouseEventArgs e)
+        {
+            if (dragging)
+            {
+                NameValueCollection values = new NameValueCollection();
+                values["color"] = rgbToInt(color).ToString();
+                values["x"] = e.X.ToString();
+                values["y"] = e.Y.ToString();
+                values["size"] = brushSizeNumericUpDown.Value.ToString();
+                client.UploadValues(url + "post.php", values);
+            }
         }
 
         private void MainForm_Load(object sender, EventArgs e)
@@ -44,6 +58,7 @@ namespace networkPaint
             string responseString = client.DownloadString(url + "data.ppf");
             client.Dispose();
             if (responseString.Trim() == "") return;
+            graphics.Clear(Color.White);
             foreach (string packet in responseString.Split(';'))
             {
                 try
@@ -63,16 +78,6 @@ namespace networkPaint
             paintArea.Image = bitmap;
         }
 
-        public static int rgbToInt(Color color)
-        {
-            return ((255 & 0x0ff) << 24) | ((color.R & 0x0ff) << 16) | ((color.G & 0x0ff) << 8) | (color.B & 0x0ff);
-        }
-
-        public static Color intToRGB(int color)
-        {
-            return Color.FromArgb(0xFF, (color & 0x00FF0000) >> 16, (color & 0x0000FF00) >> 8, color & 0x000000FF);
-        }
-
         private void changeColorButton_Click(object sender, EventArgs e)
         {
             colorDialog.ShowDialog();
@@ -98,5 +103,15 @@ namespace networkPaint
             paintArea.Image = bitmap;
             graphics = Graphics.FromImage(bitmap);
         }
+
+        public static int rgbToInt(Color color)
+        {
+            return ((255 & 0x0ff) << 24) | ((color.R & 0x0ff) << 16) | ((color.G & 0x0ff) << 8) | (color.B & 0x0ff);
+        }
+
+        public static Color intToRGB(int color)
+        {
+            return Color.FromArgb(0xFF, (color & 0x00FF0000) >> 16, (color & 0x0000FF00) >> 8, color & 0x000000FF);
+        }
     }
 }