diff --git a/src/libCom/osi/os/WIN32/dllmain.cpp b/src/libCom/osi/os/WIN32/dllmain.cpp
deleted file mode 100644
index 38ce94e42..000000000
--- a/src/libCom/osi/os/WIN32/dllmain.cpp
+++ /dev/null
@@ -1,68 +0,0 @@
-/*************************************************************************\
-* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
-*     National Laboratory.
-* Copyright (c) 2002 The Regents of the University of California, as
-*     Operator of Los Alamos National Laboratory.
-* EPICS BASE Versions 3.13.7
-* and higher are distributed subject to a Software License Agreement found
-* in file LICENSE that is included with this distribution. 
-\*************************************************************************/
-/*
- *	dllmain.c
- *
- *	WIN32 specific initialisation for the Com library,
- *	based on Chris Timossi's base/src/ca/windows_depend.c,
- *	especially initializing:
- *		ositime
- *
- *      8-2-96  -kuk-
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#define VC_EXTRALEAN
-#define STRICT
-#include <winsock2.h>
-
-#include "epicsVersion.h"
-#define epicsExportSharedSymbols
-#include "osiSock.h"
-
-#ifndef _WIN32
-#   error This source is specific to WIN32 
-#endif
-
-extern "C" void epicsThreadCleanupWIN32 ();
-
-#if !defined(EPICS_DLL_NO)
-BOOL WINAPI DllMain(HANDLE hModule, DWORD dwReason, LPVOID lpReserved)
-{
-	switch (dwReason) 
-	{
-	case DLL_PROCESS_ATTACH:
-		//if ( ! osiSockAttach() ) 
-		//	return FALSE;
-#		if defined ( _DEBUG ) && 0
-			fprintf(stderr, "Process attached to Com.dll version %s\n", EPICS_VERSION_STRING);
-#		endif
-		break;
-
-	case DLL_PROCESS_DETACH:
-		//osiSockRelease();
-        //epicsThreadCleanupWIN32 ();
-#		if defined ( _DEBUG ) && 0
-			fprintf(stderr, "Process detached from Com.dll version %s\n", EPICS_VERSION_STRING);
-#		endif
-		break;
-
-	case DLL_THREAD_DETACH:
-        //epicsThreadCleanupWIN32 ();
-        break;
-	}
-
-	return TRUE;
-}
-#endif
-