Added cguid.h.

diff --git a/include/Makefile.in b/include/Makefile.in
index ad000a0..4b6c0f2 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -7,6 +7,7 @@
 INSTALLED_INCLUDES = \
 	basetsd.h \
 	cderr.h \
+	cguid.h \
 	commctrl.h \
 	commdlg.h \
 	compobj.h \