Index: /trunk/src/VBox/ExtPacks/VBoxDTrace/ExtPack.xml
===================================================================
--- /trunk/src/VBox/ExtPacks/VBoxDTrace/ExtPack.xml	(revision 53975)
+++ /trunk/src/VBox/ExtPacks/VBoxDTrace/ExtPack.xml	(revision 53976)
@@ -4,4 +4,5 @@
     <Description>Experimental and unsupported extension pack providing DTrace features to VirtualBox.</Description>
     <Version revision="@VBOX_SVN_REV@">@VBOX_VERSION_STRING@</Version>
+    <MainModule>VBoxDTraceMain</MainModule>
 </VirtualBoxExtensionPack>
 
Index: /trunk/src/VBox/ExtPacks/VBoxDTrace/Makefile.kmk
===================================================================
--- /trunk/src/VBox/ExtPacks/VBoxDTrace/Makefile.kmk	(revision 53975)
+++ /trunk/src/VBox/ExtPacks/VBoxDTrace/Makefile.kmk	(revision 53976)
@@ -44,4 +44,12 @@
 	COPYING=>ExtPack-SourceCodeLicense.txt
 $(call VBOX_EDIT_VERSION_RULE_FN,VBoxDTraceIns,ExtPack.xml)
+
+
+#
+# VBoxSkeletonMain - The module which the VirtualBox Main API talks to.
+#
+DLLS += VBoxDTraceMain
+VBoxDTraceMain_TEMPLATE = VBoxR3ExtPackDTrace
+VBoxDTraceMain_SOURCES = VBoxDTraceMain.cpp
 
 
Index: /trunk/src/VBox/ExtPacks/VBoxDTrace/VBoxDTraceMain.cpp
===================================================================
--- /trunk/src/VBox/ExtPacks/VBoxDTrace/VBoxDTraceMain.cpp	(revision 53976)
+++ /trunk/src/VBox/ExtPacks/VBoxDTrace/VBoxDTraceMain.cpp	(revision 53976)
@@ -0,0 +1,137 @@
+/* $Id$ */
+/** @file
+ * VBoxDTrace main module.
+ */
+
+/*
+ * Copyright (C) 2010-2016 Oracle Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*******************************************************************************
+*   Header Files                                                               *
+*******************************************************************************/
+#include <VBox/ExtPack/ExtPack.h>
+
+#include <VBox/err.h>
+#include <VBox/version.h>
+#include <VBox/vmm/cfgm.h>
+#include <iprt/string.h>
+#include <iprt/param.h>
+#include <iprt/path.h>
+
+
+/*******************************************************************************
+*   Global Variables                                                           *
+*******************************************************************************/
+/** Pointer to the extension pack helpers. */
+static PCVBOXEXTPACKHLP g_pHlp;
+
+
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnInstalled}
+//  */
+// static DECLCALLBACK(void) vboxSkeletonExtPack_Installed(PCVBOXEXTPACKREG pThis, VBOXEXTPACK_IF_CS(IVirtualBox) *pVirtualBox);
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnUninstall}
+//  */
+// static DECLCALLBACK(int)  vboxSkeletonExtPack_Uninstall(PCVBOXEXTPACKREG pThis, VBOXEXTPACK_IF_CS(IVirtualBox) *pVirtualBox);
+//
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnVirtualBoxReady}
+//  */
+// static DECLCALLBACK(void)  vboxSkeletonExtPack_VirtualBoxReady(PCVBOXEXTPACKREG pThis, VBOXEXTPACK_IF_CS(IVirtualBox) *pVirtualBox);
+//
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnUnload}
+//  */
+// static DECLCALLBACK(void) vboxSkeletonExtPack_Unload(PCVBOXEXTPACKREG pThis);
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnVMCreated}
+//  */
+// static DECLCALLBACK(int)  vboxSkeletonExtPack_VMCreated(PCVBOXEXTPACKREG pThis, VBOXEXTPACK_IF_CS(IVirtualBox) *pVirtualBox, IMachine *pMachine);
+//
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnVMConfigureVMM}
+//  */
+// static DECLCALLBACK(int)  vboxSkeletonExtPack_VMConfigureVMM(PCVBOXEXTPACKREG pThis, IConsole *pConsole, PVM pVM);
+//
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnVMPowerOn}
+//  */
+// static DECLCALLBACK(int)  vboxSkeletonExtPack_VMPowerOn(PCVBOXEXTPACKREG pThis, IConsole *pConsole, PVM pVM);
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnVMPowerOff}
+//  */
+// static DECLCALLBACK(void) vboxSkeletonExtPack_VMPowerOff(PCVBOXEXTPACKREG pThis, IConsole *pConsole, PVM pVM);
+// /**
+//  * @interface_method_impl{VBOXEXTPACKREG,pfnVMPowerOff}
+//  */
+// static DECLCALLBACK(void) vboxSkeletonExtPack_QueryObject(PCVBOXEXTPACKREG pThis, PCRTUUID pObjectId);
+
+
+static const VBOXEXTPACKREG g_vboxSkeletonExtPackReg =
+{
+    VBOXEXTPACKREG_VERSION,
+    /* .pfnInstalled =      */  NULL,
+    /* .pfnUninstall =      */  NULL,
+    /* .pfnVirtualBoxReady =*/  NULL,
+    /* .pfnConsoleReady =   */  NULL,
+    /* .pfnUnload =         */  NULL,
+    /* .pfnVMCreated =      */  NULL,
+    /* .pfnVMConfigureVMM = */  NULL,
+    /* .pfnVMPowerOn =      */  NULL,
+    /* .pfnVMPowerOff =     */  NULL,
+    /* .pfnQueryObject =    */  NULL,
+    VBOXEXTPACKREG_VERSION
+};
+
+
+/** @callback_method_impl{FNVBOXEXTPACKREGISTER}  */
+extern "C" DECLEXPORT(int) VBoxExtPackRegister(PCVBOXEXTPACKHLP pHlp, PCVBOXEXTPACKREG *ppReg, PRTERRINFO pErrInfo)
+{
+    /*
+     * Check the VirtualBox version.
+     */
+    if (!VBOXEXTPACK_IS_VER_COMPAT(pHlp->u32Version, VBOXEXTPACKHLP_VERSION))
+        return RTErrInfoSetF(pErrInfo, VERR_VERSION_MISMATCH,
+                             "Helper version mismatch - expected %#x got %#x",
+                             VBOXEXTPACKHLP_VERSION, pHlp->u32Version);
+    if (   VBOX_FULL_VERSION_GET_MAJOR(pHlp->uVBoxFullVersion) != VBOX_VERSION_MAJOR
+        || VBOX_FULL_VERSION_GET_MINOR(pHlp->uVBoxFullVersion) != VBOX_VERSION_MINOR)
+        return RTErrInfoSetF(pErrInfo, VERR_VERSION_MISMATCH,
+                             "VirtualBox version mismatch - expected %u.%u got %u.%u",
+                             VBOX_VERSION_MAJOR, VBOX_VERSION_MINOR,
+                             VBOX_FULL_VERSION_GET_MAJOR(pHlp->uVBoxFullVersion),
+                             VBOX_FULL_VERSION_GET_MINOR(pHlp->uVBoxFullVersion));
+
+    /*
+     * We're good, save input and return the registration structure.
+     */
+    g_pHlp = pHlp;
+    *ppReg = &g_vboxSkeletonExtPackReg;
+
+    return VINF_SUCCESS;
+}
+