NAME
    CallHookA -- Invoke a hook given a pointer to a message.  (V36)
SYNOPSIS
    result = CallHookA( hookPtr, obj, message )
    ULONG CallHook( struct Hook *, Object *, APTR );
FUNCTION
    Invoke a hook on the supplied hook-specific data (an "object")
    and a parameter packet ("message").  This function is equivalent
    to utility.library/CallHookPkt().
INPUTS
    hookPtr - A system-standard hook
    obj - hook-specific data object
    message - The hook-specific message you wish to send
RESULT
    result - a hook-specific result.
NOTES
    While this function requires V36 or higher intuition.library,
    it first appeared in V37 amiga.lib.
SEE ALSO
    CallHook(), utility.library/CallHookPkt(), <utility/hooks.h>