[Info-vax] QIO Writes to a mailbox

[Bob Koehler]

In article <4eba91bd$0$291$14726298 at news.sunsite.dk>, Roy Omond <roy at omond.net> writes:
> 
> Ask Costas or Simon to fish out the source listing for the mailbox
> driver and see for yourself how the data buffer is handled by the
> driver.  I wouldn't say it's "implementation specific" - that would
> seem to imply that there are differences between "implementations"
> of VMS.

   However, the behaviour inside the driver is not part of a documented
   API and could change with the next minor patch you install.

   Not likey?  I've been down that path fixing other people's code that
   claimed in the comments that they knew what was likely.