Index: source/gui/CGUI.h
===================================================================
--- source/gui/CGUI.h
+++ source/gui/CGUI.h
@@ -622,10 +622,13 @@
 	static const CStr EventNameRelease;
 	static const CStr EventNameMouseRightPress;
 	static const CStr EventNameMouseLeftPress;
+	static const CStr EventNameMouseMiddlePress;
 	static const CStr EventNameMouseWheelDown;
 	static const CStr EventNameMouseWheelUp;
 	static const CStr EventNameMouseLeftDoubleClick;
 	static const CStr EventNameMouseLeftRelease;
+	static const CStr EventNameMouseMiddleDoubleClick;
+	static const CStr EventNameMouseMiddleRelease;
 	static const CStr EventNameMouseRightDoubleClick;
 	static const CStr EventNameMouseRightRelease;
 
Index: source/gui/CGUI.cpp
===================================================================
--- source/gui/CGUI.cpp
+++ source/gui/CGUI.cpp
@@ -53,12 +53,15 @@
 const CStr CGUI::EventNameRelease = "Release";
 const CStr CGUI::EventNameMouseRightPress = "MouseRightPress";
 const CStr CGUI::EventNameMouseLeftPress = "MouseLeftPress";
+const CStr CGUI::EventNameMouseMiddlePress = "MouseMiddlePress";
 const CStr CGUI::EventNameMouseWheelDown = "MouseWheelDown";
 const CStr CGUI::EventNameMouseWheelUp = "MouseWheelUp";
 const CStr CGUI::EventNameMouseLeftDoubleClick = "MouseLeftDoubleClick";
 const CStr CGUI::EventNameMouseLeftRelease = "MouseLeftRelease";
 const CStr CGUI::EventNameMouseRightDoubleClick = "MouseRightDoubleClick";
 const CStr CGUI::EventNameMouseRightRelease = "MouseRightRelease";
+const CStr CGUI::EventNameMouseMiddleDoubleClick = "MouseMiddleDoubleClick";
+const CStr CGUI::EventNameMouseMiddleRelease = "MouseMiddleRelease";
 
 CGUI::CGUI(const shared_ptr<ScriptRuntime>& runtime)
 	: m_BaseObject(*this),
@@ -179,6 +182,11 @@
 					ret = pNearest->SendMouseEvent(GUIM_MOUSE_PRESS_RIGHT, EventNameMouseRightPress);
 				break;
 
+			case SDL_BUTTON_MIDDLE:
+				if (pNearest)
+					ret = pNearest->SendEvent(GUIM_MOUSE_PRESS_MIDDLE, EventNameMouseMiddlePress);
+				break;
+
 			default:
 				break;
 			}
@@ -216,6 +224,18 @@
 						ret = pNearest->SendMouseEvent(GUIM_MOUSE_RELEASE_RIGHT, EventNameMouseRightRelease);
 				}
 				break;
+			case SDL_BUTTON_MIDDLE:
+				if (pNearest)
+				{
+					double timeElapsed = timer_Time() - pNearest->m_LastClickTime[SDL_BUTTON_MIDDLE];
+					pNearest->m_LastClickTime[SDL_BUTTON_MIDDLE] = timer_Time();
+
+					if (timeElapsed < SELECT_DBLCLICK_RATE)
+						ret = pNearest->SendEvent(GUIM_MOUSE_DBLCLICK_MIDDLE, EventNameMouseMiddleDoubleClick);
+					else
+						ret = pNearest->SendEvent(GUIM_MOUSE_RELEASE_MIDDLE, EventNameMouseMiddleRelease);
+				}
+				break;
 			}
 
 			// Reset all states on all visible objects
Index: source/gui/SGUIMessage.h
===================================================================
--- source/gui/SGUIMessage.h
+++ source/gui/SGUIMessage.h
@@ -34,11 +34,14 @@
 	GUIM_MOUSE_PRESS_RIGHT,
 	GUIM_MOUSE_DOWN_LEFT,
 	GUIM_MOUSE_DOWN_RIGHT,
+	GUIM_MOUSE_PRESS_MIDDLE,
 	GUIM_MOUSE_DBLCLICK_LEFT,
 	GUIM_MOUSE_DBLCLICK_LEFT_ITEM, // Triggered when doubleclicking on a list item
 	GUIM_MOUSE_DBLCLICK_RIGHT,
+	GUIM_MOUSE_DBLCLICK_MIDDLE,
 	GUIM_MOUSE_RELEASE_LEFT,
 	GUIM_MOUSE_RELEASE_RIGHT,
+	GUIM_MOUSE_RELEASE_MIDDLE,
 	GUIM_MOUSE_WHEEL_UP,
 	GUIM_MOUSE_WHEEL_DOWN,
 	GUIM_SETTINGS_UPDATED,	// SGUIMessage.m_Value = name of setting