> There are two approaches in general: to store the pointer somewhere, where
> it is accessible during SysTrap, and the HackMaster approach, which is to
> allocate a small piece of memory at startup and modify it so that it
> contains _code_, than points or directly returns that value.
it is possible to save it in database?
Eric
>
> The first approach is easier, but less safe. Be careful and do not use
> FtrSet/FtrGet pair, which doesn't work under most of the SysTraps (well,
> haven't tried them all: under _some_ of the SysTraps). Using SysTrapReserved
> is an option, but, as Bob and David Fedor have said about 15000
> times....it's rude and unsecured...
>
> The second approach requires some Assembler knowledge. Or, I remember a
> posting (maybe by Ken Krugler) that contained a piece of such code for C.
>
> Finally, I'd once again suggest that you try and catch DmGetResource. It
> worked for me when I had to replace the system keyboard.
>
> Hope this helps,
> Bobby Kolev
>
>
>
>
> -----Original Message-----
> From: Daniel McCarty <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> Date: Tuesday, August 17, 1999 3:51 PM
> Subject: Re: how to save a function pointer?
>
>
> >Eric wrote:
> >>
> >> my patch replace the system keyboard, I use sysgettrapaddress to
> >> get the system keyboard function pointer first, I want to save it in
> >> database so that I can recover it later.
> >>
> >> void (*oldKeyboardPtr)(KeyboardType);
> >> oldKeyboardPtr=SysGetTrapAddress(0xA2E2);
> >>
> >> how to save the oldKeyboardPtr?
> >
> > Saving sys trap pointers (dynamic) in databases (static) isn't
> >a very good idea. What is it that you're trying to do that would
> >cause you to have to "recover" the trap address?
> >
> >-Daniel.
>
>
