Re: Continuing problem with SendMessage and WM_CCOPYDATA

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#4279

From: Alan Bellingham
Date: Tue, 28 Feb 2006 18:00

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"JD" <nospam@nospam.com> wrote:

>That block of code only executes if another instance of the
>application is already running:
>
>    if ( GetLastError() == ERROR_ALREADY_EXISTS )
>      {
>         HWND MainFormHWnd = FindWindow( "TMyApplicationMainForm", NULL );
>         ....
>      }
>
>How can you be sure that FindWindow returns the first instance
>v/s the instance in which that block is executing?

Very easily - after all, the second and subsequent instances know that
there should only be one instance. Therefore, when they detect the first
instance already exists, they don't create the window.

I assume you know how not to create a window?

Alan Bellingham
-- 
ACCU Conference 2006 - 19-22 April, Randolph Hotel, Oxford, UK

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From: Alan Bellingham <alanb@episys.com>
Newsgroups: borland.public.cppbuilder.nativeapi
Subject: Re: Continuing problem with SendMessage and WM_CCOPYDATA
Date: Tue, 28 Feb 2006 18:00:52 +0000
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