Added command and return constants used by WM_NOTIFYFORMAT.
diff --git a/include/windows.h b/include/windows.h
index 3f4c58c..98c0d43 100644
--- a/include/windows.h
+++ b/include/windows.h
@@ -3410,6 +3410,12 @@
#define WM_CPL_LAUNCH (WM_USER + 1000)
#define WM_CPL_LAUNCHED (WM_USER + 1001)
+/* WM_NOTIFYFORMAT commands and return values */
+#define NFR_ANSI 1
+#define NFR_UNICODE 2
+#define NF_QUERY 3
+#define NF_REQUERY 4
+
/* Key status flags for mouse events */
#define MK_LBUTTON 0x0001
#define MK_RBUTTON 0x0002
