Re: Communicating between Applications

On Tue, 14 Mar 2006 22:25:12 -0000, "Mike Williams"
<Mike@xxxxxxxxxxxxxxxxx> wrote:
in <eSrpmY7RGHA.1728@xxxxxxxxxxxxxxxxxxxx>

"Karl E. Peterson" <karl@xxxxxxxx> wrote in message
news:e9m70M7RGHA.1688@xxxxxxxxxxxxxxxxxxxxxxx

There are scores of methods. Probably the simplest would be to pass
an hWnd to AppB on its command line, and then send progress messages
back to that window. Would require a hook --

Actually that's the way I do it, except that I do it in a way that doesn't
require a hook. I pass the "slave" app the hwnd of an otherwise unused (and
invisible) textBox in the main "master" app and then the slave app uses the
SendMessage API to send the hwnd a WM_SETTEXT message along with a string of
your own choosing. The "master" app knows exactly when the message is
received because it triggers the invisible Text Box's Change event. An added
bonus of this method is that you can send all sorts of different messages
back simply by choosing an appropriate string.

Mike



Uhh, err um, uhh that would be mailslots.

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Relevant Pages

  • Re: Communicating between Applications
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