diff --git a/src/Perspex.Input/Raw/RawInputEventArgs.cs b/src/Perspex.Input/Raw/RawInputEventArgs.cs
index 4918710c46..4cf5d4c320 100644
--- a/src/Perspex.Input/Raw/RawInputEventArgs.cs
+++ b/src/Perspex.Input/Raw/RawInputEventArgs.cs
@@ -5,8 +5,22 @@ using System;
 
 namespace Perspex.Input.Raw
 {
+    /// <summary>
+    /// A raw input event.
+    /// </summary>
+    /// <remarks>
+    /// Raw input events are sent from the windowing subsystem to the <see cref="InputManager"/>
+    /// for processing: this gives an application the opportunity to pre-process the event. After
+    /// pre-processing they are consumed by the relevant <see cref="Device"/> and turned into
+    /// standard Perspex events.
+    /// </remarks>
     public class RawInputEventArgs : EventArgs
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="RawInputEventArgs"/> class.
+        /// </summary>
+        /// <param name="device">The associated device.</param>
+        /// <param name="timestamp">The event timestamp.</param>
         public RawInputEventArgs(IInputDevice device, uint timestamp)
         {
             Contract.Requires<ArgumentNullException>(device != null);
@@ -15,8 +29,24 @@ namespace Perspex.Input.Raw
             Timestamp = timestamp;
         }
 
-        public IInputDevice Device { get; private set; }
+        /// <summary>
+        /// Gets the associated device.
+        /// </summary>
+        public IInputDevice Device { get; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether the event was handled.
+        /// </summary>
+        /// <remarks>
+        /// If an event is not marked handled after processing via the
+        /// <see cref="InputManager"/>, then it will be passed on to the underlying OS for
+        /// handling.
+        /// </remarks>
         public bool Handled { get; set; }
+
+        /// <summary>
+        /// Gets the timestamp associated with the event.
+        /// </summary>
         public uint Timestamp { get; private set; }
     }
 }
diff --git a/src/Perspex.Input/Raw/RawMouseEventArgs.cs b/src/Perspex.Input/Raw/RawMouseEventArgs.cs
index 154515085b..80cd4716de 100644
--- a/src/Perspex.Input/Raw/RawMouseEventArgs.cs
+++ b/src/Perspex.Input/Raw/RawMouseEventArgs.cs
@@ -18,14 +18,27 @@ namespace Perspex.Input.Raw
         Wheel,
     }
 
+    /// <summary>
+    /// A raw mouse event.
+    /// </summary>
     public class RawMouseEventArgs : RawInputEventArgs
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="RawMouseEventArgs"/> class.
+        /// </summary>
+        /// <param name="device">The associated device.</param>
+        /// <param name="timestamp">The event timestamp.</param>
+        /// <param name="root">The root from which the event originates.</param>
+        /// <param name="type">The type of the event.</param>
+        /// <param name="position">The mouse position, in client DIPs.</param>
+        /// <param name="inputModifiers">The input modifiers.</param>
         public RawMouseEventArgs(
             IInputDevice device,
             uint timestamp,
             IInputRoot root,
             RawMouseEventType type,
-            Point position, InputModifiers inputModifiers)
+            Point position, 
+            InputModifiers inputModifiers)
             : base(device, timestamp)
         {
             Contract.Requires<ArgumentNullException>(device != null);
@@ -37,12 +50,24 @@ namespace Perspex.Input.Raw
             InputModifiers = inputModifiers;
         }
 
-        public IInputRoot Root { get; private set; }
+        /// <summary>
+        /// Gets the root from which the event originates.
+        /// </summary>
+        public IInputRoot Root { get; }
 
+        /// <summary>
+        /// Gets the mouse position, in client DIPs.
+        /// </summary>
         public Point Position { get; set; }
 
+        /// <summary>
+        /// Gets the type of the event.
+        /// </summary>
         public RawMouseEventType Type { get; private set; }
 
+        /// <summary>
+        /// Gets the input modifiers.
+        /// </summary>
         public InputModifiers InputModifiers { get; private set; }
     }
 }