Index: /Include/Classes/System/IO/index.ab
===================================================================
--- /Include/Classes/System/IO/index.ab	(revision 112)
+++ /Include/Classes/System/IO/index.ab	(revision 113)
@@ -1,4 +1,6 @@
 '#require "Directory.ab"
 '#require "DirectoryInfo.ab"
+
+#require "misc.ab"
 #require "DriveInfo.ab"
 #require "File.ab"
Index: /Include/Classes/System/IO/misc.ab
===================================================================
--- /Include/Classes/System/IO/misc.ab	(revision 113)
+++ /Include/Classes/System/IO/misc.ab	(revision 113)
@@ -0,0 +1,15 @@
+
+Interface IAsyncResult
+	Function AsyncState() As Object
+	Function AsyncWaitHandle() As WaitHandle
+	Function CompletedSynchronously() As Boolean
+	Function IsCompleted() As Boolean
+End Interface
+
+TypeDef /* [Delegate] */ AsyncCallback = *Sub(ByRef ar As IAsyncResult)
+
+Enum SeekOrigin
+	Begin
+	Current
+	End
+End Enum