add RichTextBox style

HandyControlDemo/Data/MessageToken.cs

@@ -98,6 +98,8 @@
 
         public static readonly string ListViewDemoCtl = nameof(ListViewDemoCtl);
 
+        public static readonly string RichTextBoxDemoCtl = nameof(RichTextBoxDemoCtl);
+
         public static readonly string CommonWindow = nameof(CommonWindow);
 
         public static readonly string CustomNonClientAreaWindow = nameof(CustomNonClientAreaWindow);

HandyControlDemo/Data/MessageToken.tt

@@ -54,7 +54,8 @@ var styleList = new List<string>
 	"BrushDemoCtl",
 	"SliderDemoCtl",
 	"GroupBoxDemoCtl",
-	"ListViewDemoCtl"
+	"ListViewDemoCtl",
+	"RichTextBoxDemoCtl"
 };
 var windowList = new List<string>
 {