diff -c -t LanMan98::tony.$.OSLib.!OsLib601.Support.h/callback LanMan98::tony.$.OSLib.!Experimental.Support.h/callback
*** LanMan98::tony.$.OSLib.!OsLib601.Support.h/callback Thu Feb 10 18:03:34 2000
--- LanMan98::tony.$.OSLib.!Experimental.Support.h/callback     Wed May  3 17:15:56 2000
***************
*** 22,29 ****
--- 22,34 ----
  */
  
  /* Changed by J R C 16th Aug 1994 to return |os_error *|.
+    TV 20000503 |bool| replaced by |osbool|
   */
  
+ #if !defined types_H
+    #include "types.h"
+ #endif
+ 
  #ifndef os_H
     #include "os.h"
  #endif
***************
*** 34,40 ****
  
  /* The type of a callback function.
   */
! typedef os_error *callback_fn (void *, void *, bool *);
  
  /* The type of a callback list.
   */
--- 39,45 ----
  
  /* The type of a callback function.
   */
! typedef os_error *callback_fn (void *, void *, osbool *);
  
  /* The type of a callback list.
   */
***************
*** 60,66 ****
   * values will be called, and passed the given handle, until
   * one is claimed.
   */
! extern os_error *callback (callback_l, void *, bool *, int, ...);
  
  /* Function to register a new callback function.
   *
--- 65,71 ----
   * values will be called, and passed the given handle, until
   * one is claimed.
   */
! extern os_error *callback (callback_l, void *, osbool *, int, ...);
  
  /* Function to register a new callback function.
   *
