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From: Dave Cullen on 15 May 2008 07:24 I have an MFC dll that opens serial ports via CreateFile. Will the comport handles be released when the calling program terminates, or do I need to call CloseHandle before exiting? Thanks
From: Scott McPhillips [MVP] on 15 May 2008 09:04 "Dave Cullen" <nospam(a)mail.com> wrote in message news:OKp0D5ntIHA.4376(a)TK2MSFTNGP06.phx.gbl... >I have an MFC dll that opens serial ports via CreateFile. Will the comport >handles be released when the calling program terminates, or do I need to >call CloseHandle before exiting? You should definitely CloseHandle before exiting. There have been cases on some versions of Windows where leaving the port open makes it inaccessible after the program closes. -- Scott McPhillips [VC++ MVP]
From: Victor Bazarov on 15 May 2008 08:37
Dave Cullen wrote: > I have an MFC dll that opens serial ports via CreateFile. Will the comport > handles be released when the calling program terminates, or do I need to > call CloseHandle before exiting? I don't know the exact answer to your first question (although I suspect the answer is 'yes'), but here is the rule of thumb I use: always close all files and all handles you open (and own) as soon as they are not needed any longer. V -- Please remove capital 'A's when replying by e-mail I do not respond to top-posted replies, please don't ask |