Index: src/chext/chext.idl
===================================================================
diff -u -rd2b121c78f510b5384b8ef0ca80afbfd7f77fef7 -rd0fdcc905035e648382256101a3d99f429af6d56
--- src/chext/chext.idl	(.../chext.idl)	(revision d2b121c78f510b5384b8ef0ca80afbfd7f77fef7)
+++ src/chext/chext.idl	(.../chext.idl)	(revision d0fdcc905035e648382256101a3d99f429af6d56)
@@ -25,6 +25,17 @@
 import "oaidl.idl";
 import "ocidl.idl";
 	[
+		v1_enum,
+		uuid(54F8BFDD-6685-4792-94BD-40DF00099F9B),
+		helpstring("Shell extension flags")
+	]
+	enum EShellExtFlags
+	{
+		eShellExt_None = 0,
+		eShellExt_Enabled = 1
+	};
+
+	[
 		object,
 		uuid(413AA618-E769-4E6E-A610-7BDC8A189FB2),
 		dual,
@@ -54,6 +65,26 @@
 //		[id(1), helpstring("method InvokeCommand")] HRESULT InvokeCommand(LPCMINVOKECOMMANDINFO lpici);
 	};
 
+	[
+		object,
+		uuid(317E503A-9D2F-4f42-995E-D314CB9D89B0),
+		dual,
+		helpstring("IShellExtControl Interface"),
+		pointer_default(unique)
+	]
+	interface IShellExtControl : IDispatch
+	{
+		// Shell extension version (numeric and readable)
+		[id(1),helpstring("Retrieves the extension version information")]
+			HRESULT GetVersion([out]LONG* plVersion, [out]BSTR* pbstrVersion);
+
+		// Flag setting/retrieving
+		[id(2),helpstring("Sets the flags for shell extension")]
+			HRESULT SetFlags(LONG lFlags, LONG lMask);
+		[id(3),helpstring("Retrieves the shell extension flags")]
+			HRESULT GetFlags(LONG* plFlags);
+	};
+
 [
 	uuid(68FAFC14-8EB8-4DA1-90EB-6B3D22010505),
 	version(1.0),
@@ -80,4 +111,12 @@
 	{
 		[default] interface IDropMenuExt;
 	};
+	[
+		uuid(3D855ACA-8274-4f1f-94E9-6BEF4FC2A2AF),
+		helpstring("CShellExtControl Class")
+	]
+	coclass CShellExtControl
+	{
+		[default] interface IShellExtControl;
+	};
 };