Add project files.

AssetStudioGUI/GUILogger.cs

@@ -0,0 +1,34 @@
+using AssetStudio;
+using System;
+using System.Windows.Forms;
+
+namespace AssetStudioGUI
+{
+    class GUILogger : ILogger
+    {
+        public bool ShowErrorMessage = true;
+        private Action<string> action;
+
+        public GUILogger(Action<string> action)
+        {
+            this.action = action;
+        }
+
+        public void Log(LoggerEvent loggerEvent, string message)
+        {
+            switch (loggerEvent)
+            {
+                case LoggerEvent.Error:
+                    if (ShowErrorMessage)
+                    {
+                        MessageBox.Show(message);
+                    }
+                    break;
+                default:
+                    action(message);
+                    break;
+            }
+
+        }
+    }
+}