1 files changed, 28 insertions, 0 deletions

diff --git a/src/WixToolset.Core/Preprocess/IfDefEventHandler.cs b/src/WixToolset.Core/Preprocess/IfDefEventHandler.cs
new file mode 100644
index 00000000..ff181d61
--- /dev/null
+++ b/src/WixToolset.Core/Preprocess/IfDefEventHandler.cs
@@ -0,0 +1,28 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Core.Preprocess
+{
+    using System;
+    using WixToolset.Data;
+
+    public delegate void IfDefEventHandler(object sender, IfDefEventArgs e);
+
+    public class IfDefEventArgs : EventArgs
+    {
+        public IfDefEventArgs(SourceLineNumber sourceLineNumbers, bool isIfDef, bool isDefined, string variableName)
+        {
+            this.SourceLineNumbers = sourceLineNumbers;
+            this.IsIfDef = isIfDef;
+            this.IsDefined = isDefined;
+            this.VariableName = variableName;
+        }
+
+        public SourceLineNumber SourceLineNumbers { get; }
+
+        public bool IsDefined { get; }
+
+        public bool IsIfDef { get; }
+
+        public string VariableName { get; }
+    }
+}