diff --git a/src/ScintillaNET/Lexer.cs b/src/ScintillaNET/Lexer.cs
index be199bc..aa9d677 100644
--- a/src/ScintillaNET/Lexer.cs
+++ b/src/ScintillaNET/Lexer.cs
@@ -86,6 +86,11 @@ public enum Lexer
         /// </summary>
         PhpScript = NativeMethods.SCLEX_PHPSCRIPT,
 
+        /// <summary>
+        /// Properties file (INI) lexer.
+        /// </summary>
+        Properties = NativeMethods.SCLEX_PROPERTIES,
+
         /// <summary>
         /// The PureBasic language lexer.
         /// </summary>
diff --git a/src/ScintillaNET/NativeMethods.cs b/src/ScintillaNET/NativeMethods.cs
index 6460ec2..1b23d40 100644
--- a/src/ScintillaNET/NativeMethods.cs
+++ b/src/ScintillaNET/NativeMethods.cs
@@ -1439,6 +1439,14 @@ internal static class NativeMethods
         public const int SCE_PL_STRING_QX_VAR = 65;
         public const int SCE_PL_STRING_QR_VAR = 66;
 
+        // Properties
+        public const int SCE_PROPS_DEFAULT = 0;
+        public const int SCE_PROPS_COMMENT = 1;
+        public const int SCE_PROPS_SECTION = 2;
+        public const int SCE_PROPS_ASSIGNMENT = 3;
+        public const int SCE_PROPS_DEFVAL = 4;
+        public const int SCE_PROPS_KEY = 5;
+
         // PHP script
         public const int SCE_HPHP_COMPLEX_VARIABLE = 104;
         public const int SCE_HPHP_DEFAULT = 118;
diff --git a/src/ScintillaNET/Style.cs b/src/ScintillaNET/Style.cs
index 55462da..0674bd0 100644
--- a/src/ScintillaNET/Style.cs
+++ b/src/ScintillaNET/Style.cs
@@ -1868,6 +1868,46 @@ public static class PhpScript
 
         #endregion PhpScript
 
+        #region Properties
+
+        /// <summary>
+        /// Style constants for use with the <see cref="Lexer.Properties" /> lexer.
+        /// </summary>
+        public static class Properties
+        {
+            /// <summary>
+            /// Default (whitespace) style index.
+            /// </summary>
+            public const int Default = NativeMethods.SCE_PROPS_DEFAULT;
+
+            /// <summary>
+            /// Comment style index.
+            /// </summary>
+            public const int Comment = NativeMethods.SCE_PROPS_COMMENT;
+
+            /// <summary>
+            /// Section style index.
+            /// </summary>
+            public const int Section = NativeMethods.SCE_PROPS_SECTION;
+
+            /// <summary>
+            /// Assignment operator index.
+            /// </summary>
+            public const int Assignment = NativeMethods.SCE_PROPS_ASSIGNMENT;
+
+            /// <summary>
+            /// Default (registry-only) value index.
+            /// </summary>
+            public const int DefVal = NativeMethods.SCE_PROPS_DEFVAL;
+
+            /// <summary>
+            /// Key style index.
+            /// </summary>
+            public const int Key = NativeMethods.SCE_PROPS_KEY;
+        }
+
+        #endregion Properties
+
         #region PureBasic
 
         /// <summary>