OK, so let's stop discussing whether it's a good idea or not. We can't convince each other anyway. It seems to me that the whole thing you'd need is to be able to "localyze to an outer block". Basicaly you'd need to be able to localyze some variables in your SwitchBuffer() function, but the localyzation should hold to the end of the block enclosing the SwitchBuffer() CALL. Do I make sense?

I do believe there is some way to do this already, using some lower level trickery. Cause this looks it could be helpfull in other places as well. If I were you I'd wait a day or two and if noone suggests a module, try to ask again in the SoPW.

Jenda
Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live.
   -- Rick Osborne

Edit by castaway: Closed small tag in signature