wgl: Recognize Vista's PFD_SUPPORT_COMPOSITION flag.
diff --git a/include/wingdi.h b/include/wingdi.h
index 0215922..77d8d92 100644
--- a/include/wingdi.h
+++ b/include/wingdi.h
@@ -88,6 +88,7 @@
 #define PFD_SWAP_COPY             0x00000400
 #define PFD_SWAP_LAYER_BUFFERS    0x00000800
 #define PFD_GENERIC_ACCELERATED   0x00001000
+#define PFD_SUPPORT_COMPOSITION   0x00008000 /* Vista stuff */
 
 #define PFD_DEPTH_DONTCARE        0x20000000
 #define PFD_DOUBLEBUFFER_DONTCARE 0x40000000