1 files changed, 29 insertions, 0 deletions

diff --git a/src/WixToolset.Extensibility/IWindowsInstallerBackendExtension.cs b/src/WixToolset.Extensibility/IWindowsInstallerBackendExtension.cs
new file mode 100644
index 00000000..3b01cc0d
--- /dev/null
+++ b/src/WixToolset.Extensibility/IWindowsInstallerBackendExtension.cs
@@ -0,0 +1,29 @@
+// 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.Extensibility
+{
+    using System.Collections.Generic;
+    using WixToolset.Data.Rows;
+    using WixToolset.Data.Bind;
+    using WixToolset.Extensibility.Services;
+
+    /// <summary>
+    /// Interface all binder extensions implement.
+    /// </summary>
+    public interface IWindowsInstallerBackendExtension
+    {
+        /// <summary>
+        /// Called before binding occurs.
+        /// </summary>
+        void PreBackendBind(IBindContext context);
+
+        ResolvedCabinet ResolveCabinet(string cabinetPath, IEnumerable<BindFileWithPath> files);
+
+        string ResolveMedia(MediaRow mediaRow, string mediaLayoutDirectory, string layoutDirectory);
+
+        /// <summary>
+        /// Called after all output changes occur and right before the output is bound into its final format.
+        /// </summary>
+        void PostBackendBind(BindResult result);
+    }
+}