--- a/src/share/tools/ProjectCreator/FileTreeCreatorVC10.java	Wed Aug 07 19:02:06 2013 +0400
+++ b/src/share/tools/ProjectCreator/FileTreeCreatorVC10.java	Thu Aug 08 09:21:30 2013 -0700
@@ -1,3 +1,27 @@
+/*
+ * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
 import static java.nio.file.FileVisitResult.CONTINUE;
 
 import java.io.IOException;
@@ -21,6 +45,8 @@
          boolean usePch = false;
          boolean disablePch = false;
          boolean useIgnore = false;
+         boolean isAltSrc = false;  // only needed as a debugging crumb
+         boolean isReplacedByAltSrc = false;
          String fileName = file.getFileName().toString();
 
          // TODO hideFile
@@ -30,6 +56,26 @@
             usePch = true;
          }
 
+         String fileLoc = vcProjLocation.relativize(file).toString();
+
+         // isAltSrc and isReplacedByAltSrc applies to all configs for a file
+         if (BuildConfig.matchesRelativeAltSrcInclude(
+               file.toAbsolutePath().toString())) {
+            // current file is an alternate source file so track it
+            isAltSrc = true;
+            BuildConfig.trackRelativeAltSrcFile(
+                file.toAbsolutePath().toString());
+         } else if (BuildConfig.matchesRelativeAltSrcFile(
+                    file.toAbsolutePath().toString())) {
+            // current file is a regular file that matches an alternate
+            // source file so yack about replacing the regular file
+            isReplacedByAltSrc = true;
+            System.out.println("INFO: alternate source file '" +
+                               BuildConfig.getMatchingRelativeAltSrcFile(
+                                   file.toAbsolutePath().toString()) +
+                               "' replaces '" + fileLoc + "'");
+         }
+
          for (BuildConfig cfg : allConfigs) {
             if (cfg.lookupHashFieldInContext("IgnoreFile", fileName) != null) {
                useIgnore = true;
@@ -58,9 +104,8 @@
          }
 
          String tagName = wg.getFileTagFromSuffix(fileName);
-         String fileLoc = vcProjLocation.relativize(file).toString();
 
-         if (!useIgnore && !disablePch && !usePch) {
+         if (!useIgnore && !disablePch && !usePch && !isReplacedByAltSrc) {
             wg.tag(tagName, new String[] { "Include", fileLoc});
          } else {
             wg.startTag(
@@ -78,6 +123,11 @@
                if (disablePch) {
                   wg.tag("PrecompiledHeader", "Condition", "'$(Configuration)|$(Platform)'=='" + cfg.get("Name") + "'");
                }
+               if (isReplacedByAltSrc) {
+                  wg.tagData("ExcludedFromBuild", "true", "Condition",
+                             "'$(Configuration)|$(Platform)'=='" +
+                             cfg.get("Name") + "'");
+               }
             }
             wg.endTag();
          }
@@ -137,6 +187,4 @@
       public void writeFileTree() throws IOException {
          Files.walkFileTree(this.startDir, this);
       }
-
-
-   }
\ No newline at end of file
+}