Add definitions for force feedback command and status flags.
diff --git a/include/dinput.h b/include/dinput.h
index b1fcf6a..0385913 100644
--- a/include/dinput.h
+++ b/include/dinput.h
@@ -785,6 +785,27 @@
#define DISCL_FOREGROUND 0x00000004
#define DISCL_BACKGROUND 0x00000008
+/* Device FF flags */
+#define DISFFC_RESET 0x00000001
+#define DISFFC_STOPALL 0x00000002
+#define DISFFC_PAUSE 0x00000004
+#define DISFFC_CONTINUE 0x00000008
+#define DISFFC_SETACTUATORSON 0x00000010
+#define DISFFC_SETACTUATORSOFF 0x00000020
+
+#define DIGFFS_EMPTY 0x00000001
+#define DIGFFS_STOPPED 0x00000002
+#define DIGFFS_PAUSED 0x00000004
+#define DIGFFS_ACTUATORSON 0x00000010
+#define DIGFFS_ACTUATORSOFF 0x00000020
+#define DIGFFS_POWERON 0x00000040
+#define DIGFFS_POWEROFF 0x00000080
+#define DIGFFS_SAFETYSWITCHON 0x00000100
+#define DIGFFS_SAFETYSWITCHOFF 0x00000200
+#define DIGFFS_USERFFSWITCHON 0x00000400
+#define DIGFFS_USERFFSWITCHOFF 0x00000800
+#define DIGFFS_DEVICELOST 0x80000000
+
/* Effect flags */
#define DIEFT_ALL 0x00000000
