NAME
        HookEntry -- Assembler to HLL conversion stub for hook entry.

   SYNOPSIS
        result = HookEntry( struct hook *, object *, aptr )
        D0                  A0             A2        A1

   FUNCTION
        By definition, a standard hook entry-point must receive the
        hook in A0, the object in A2, and the message in A1.  If your
        hook entry-point is written in a high-level language and is
        expecting its parameters on the stack, then HookEntry() will
        put the three parameters on the stack and invoke the function
        stored in the hook h_SubEntry field.

        This function is only useful to hook implementers, and is
        never called from C.

   INPUTS
        hook - pointer to hook being invoked
        object - pointer to hook-specific data
        msg - pointer to hook-specific message

   RESULT
        result - a hook-specific result.

   NOTES
        This function first appeared in the V37 release of amiga.lib.
        However, it does not depend on any particular version of the OS,
        and works fine even in V34.

   EXAMPLE
        If your hook dispatcher is this:

        dispatch( struct hook *hookptr, object *obj, aptr msg )
        {
            ...
        }

        Then when you initialize your hook, you would say:

        myhook.h_Entry = HookEntry;     /* amiga.lib stub */
        myhook.h_SubEntry = dispatch;   /* HLL entry */

   SEE ALSO
        callhook(), callhooka(), <utility/hooks.h>