Re: Isolating instances of an ActiveX
GlassGuy wrote:
I have an ActiveX communication control in an MFC Application. I have
several copies of the control in my application. The control communicates
with a device over the network. My problem is that when one control times
out or fails, all of the other controls have to wait for the one that is
timing out to complete it's operation. I would like to isolate each of the
controls so that they can have their own instance. There should be nothing
preventing this, since when I have the same controls in multiple executables
they do not have this conflict with each other. I am really just looking for
a way to tell the controls to maintain all of their own data and threads.
The control is vendor supplied so I don't have the option of altering it.
Thanks.
Creating each control instance in a separate thread will probably give
you the same isolation as creating them in multiple processes. (Unless
all the control instances share some global variables.) But ActiveX
controls cannot talk to anything in other threads, so each thread will
have to provide its own parent window for the control, that does not
depend on any windows in the main thread. Perhaps creating an invisible
parent window in each thread would do the job. It would probably be
worth trying to talk to someone at the control vendor before setting out
to try this suggestion.
--
Scott McPhillips [VC++ MVP]
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