diff --git a/window.odin b/window.odin
index e15009e..a2bad34 100644
--- a/window.odin
+++ b/window.odin
@@ -10,15 +10,15 @@ Window :: struct {
 
 Event :: union {
     Event_Quit,
-    Event_Key,
+    Event_Input,
     Event_Resize,
 }
 
 Event_Quit :: struct {}
 
-Event_Key_State :: enum {
-    Down,
+Event_Input_State :: enum {
     Up,
+    Down,
 }
 Virtual_Key :: enum {
     Unknown,
@@ -33,10 +33,26 @@ Virtual_Key :: enum {
     Shift, Control, Alt,
     Arrow_Up, Arrow_Down, Arrow_Left, Arrow_Right,
 }
-Event_Key :: struct {
+Event_Keyboard :: struct {
     virtual_key: Virtual_Key,
-    state: Event_Key_State,
+    state: Event_Input_State,
 }
+Event_Mouse :: union {
+    Event_Mouse_Move,
+    Event_Mouse_Button,
+}
+Event_Mouse_Move :: struct {
+    x, y: u16,
+}
+Mouse_Button :: enum { Left, Middle, Right }
+Event_Mouse_Button :: struct { button: Mouse_Button, state: Event_Input_State }
+
+Event_Input :: union {
+    Event_Keyboard,
+    Event_Mouse,
+    // TODO: SS - Add 'Event_Gamepad'?
+}
+
 Event_Resize :: struct {
     old_width, old_height: u16,
     new_width, new_height: u16,
diff --git a/window_windows.odin b/window_windows.odin
index 9e9ebac..a922769 100644
--- a/window_windows.odin
+++ b/window_windows.odin
@@ -107,6 +107,8 @@ update_windows :: proc(window: ^Window) -> Event {
         }
     }
 
+    win.CoInitializeEx(nil)
+
     ok := win.PeekMessageW(
         lpMsg = &msg,
         hWnd = nil, // NOTE: SS - Don't like that this needs to be nil but apparently it does for this window to receive the WM_CLOSE and WM_QUIT messages.
@@ -126,12 +128,63 @@ update_windows :: proc(window: ^Window) -> Event {
     // fmt.printfln("Message type: %x", msg.message)
     
     switch msg.message {
+        // Keyboard.
         case win.WM_KEYDOWN, win.WM_SYSKEYDOWN: {
-            return Event_Key { virtual_key = get_virtual_key_windows(i32(msg.wParam)), state = .Down }
+            input_event: Event_Input = Event_Keyboard {
+                virtual_key = get_virtual_key_windows(i32(msg.wParam)),
+                state = .Down
+            }
+
+            return input_event
         }
 		case win.WM_KEYUP, win.WM_SYSKEYUP: {
-            return Event_Key { virtual_key = get_virtual_key_windows(i32(msg.wParam)), state = .Up }
+            input_event: Event_Input = Event_Keyboard {
+                virtual_key = get_virtual_key_windows(i32(msg.wParam)),
+                state = .Up
+            }
+
+            return input_event
         }
+        // Mouse.
+        case win.WM_MOUSEMOVE: {
+            x := win.GET_X_LPARAM(msg.lParam)
+            y := win.GET_Y_LPARAM(msg.lParam)
+
+            assert(x >= 0)
+            assert(y >= 0)
+
+            mouse_event: Event_Mouse = Event_Mouse_Move{
+                x = u16(x),
+                y = u16(y),
+            }
+            
+            return Event_Input(mouse_event)
+        }
+        case win.WM_LBUTTONDOWN, win.WM_LBUTTONUP: {
+            mouse_event: Event_Mouse = Event_Mouse_Button {
+                button = .Left,
+                state = msg.message == win.WM_LBUTTONDOWN ? .Down : .Up
+            }
+
+            return Event_Input(mouse_event)
+        }
+        case win.WM_MBUTTONDOWN, win.WM_MBUTTONUP: {
+            mouse_event: Event_Mouse = Event_Mouse_Button {
+                button = .Middle,
+                state = msg.message == win.WM_MBUTTONDOWN ? .Down : .Up
+            }
+            
+            return Event_Input(mouse_event)
+        }
+        case win.WM_RBUTTONDOWN, win.WM_RBUTTONUP: {
+            mouse_event: Event_Mouse = Event_Mouse_Button {
+                button = .Right,
+                state = msg.message == win.WM_RBUTTONDOWN ? .Down : .Up
+            }
+            
+            return Event_Input(mouse_event)
+        }
+
         case win.WM_QUIT: {
             return Event_Quit {}
         }