将AboutBox独立为ReadOnlyRichTextBOx

ContextMenuManager/BulePointLilac.Controls/ReadOnlyRichTextBox.cs

@@ -0,0 +1,36 @@
+using System.Diagnostics;
+using System.Drawing;
+using System.Windows.Forms;
+
+namespace BulePointLilac.Controls
+{
+    sealed class ReadOnlyRichTextBox : RichTextBox
+    {
+        public ReadOnlyRichTextBox()
+        {
+            this.ReadOnly = true;
+            this.Dock = DockStyle.Fill;
+            this.BackColor = Color.White;
+            this.BorderStyle = BorderStyle.None;
+            this.ForeColor = Color.FromArgb(60, 60, 60);
+            this.Font = new Font(SystemFonts.MenuFont.FontFamily, 10F);
+        }
+
+        const int WM_SETFOCUS = 0x0007;
+        const int WM_KILLFOCUS = 0x0008;
+        protected override void WndProc(ref Message m)
+        {
+            switch(m.Msg)
+            {
+                case WM_SETFOCUS:
+                    m.Msg = WM_KILLFOCUS; break;
+            }
+            base.WndProc(ref m);
+        }
+
+        protected override void OnLinkClicked(LinkClickedEventArgs e)
+        {
+            base.OnLinkClicked(e); Process.Start(e.LinkText);
+        }
+    }
+}