+#define setMoveIntoAcidProperty(l, e, v) \
+ (setBitfieldProperty(&(l)->can_move_into_acid_bits, \
+ EP_CAN_MOVE_INTO_ACID, e, v))
+#define getMoveIntoAcidProperty(l, e) \
+ (getBitfieldProperty(&(l)->can_move_into_acid_bits, \
+ EP_CAN_MOVE_INTO_ACID, e))
+#define setDontCollideWithProperty(l, e, v) \
+ (setBitfieldProperty(&(l)->dont_collide_with_bits, \
+ EP_DONT_COLLIDE_WITH, e, v))
+#define getDontCollideWithProperty(l, e) \
+ (getBitfieldProperty(&(l)->dont_collide_with_bits, \
+ EP_DONT_COLLIDE_WITH, e))
+
+void setBitfieldProperty(int *, int, int, boolean);
+boolean getBitfieldProperty(int *, int, int);
+
+void InitElementPropertiesStatic(void);
+void InitElementPropertiesEngine(int);
+
+void ReloadCustomArtwork(int);
+
+void KeyboardAutoRepeatOffUnlessAutoplay();
+
+void OpenAll(void);
+void CloseAllAndExit(int);