build/Makefile.msvcproj: Improve documentation

Tell people about what happens when generating projects when Visual
Studio 2013 or later is required, and mention that the .headers are
only needed when headers need to be copied.

diff --git a/build/Makefile.msvcproj b/build/Makefile.msvcproj
index a7bae54f48d2737a5912e9773c41dddeebcc016d..a4e93a5d04dbca012f28ff4d863638654944f70b 100644 (file)
--- a/build/Makefile.msvcproj
+++ b/build/Makefile.msvcproj
@@ -17,14 +17,19 @@
 #   MSVCPROJS = YourProject (can be multiple projects in a single srcdir)
 #   YourProject_FILES = $(libyourlib_1_0_SOURCES)
 #   YourProject_EXCLUDES = ... # list of sources to exclude, separated by '|', wildcards allowed; use random unsed value if none
+#   (the following 3 lines if headers need to be installed)
 #   YourProject_HEADERS_DIR = $(libyourlibincludedir)
 #   YourProject_HEADERS_INST = $(libyourlib_1_0_HEADERS)
 #   YourProject_HEADERS_EXCLUDES = ... # <list of headers to exclude from installation, separated by '|', wildcards allowed; use random unsed value if none>
 #
 #   dist-hook: \ # (or add to it if it is already there, note the vs9 items will also call the vs10 items in the process)
 #      $(top_builddir)/build/win32/vs9/YourProject.vcproj      \
-#      $(top_builddir)/build/win32/vs9/YourProject.headers
-
+#      $(top_builddir)/build/win32/vs9/YourProject.headers     # if headers need to be installed
+#
+#   --or, if Visual Studio 2013 or later is required--
+#   dist-hook: \ # (or add to it if it is already there, this does -not- call other vs items in the process)
+#      $(top_builddir)/build/win32/vs12/YourProject.vcxproj    \
+#      $(top_builddir)/build/win32/vs12/YourProject.vs12.headers       # if headers need to be installed
 
 # Private functions