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Article #4552Re: Sending a character string as a message ?
From: Ed Mulroy
Date: Sun, 08 Jan 2006 14:46
Date: Sun, 08 Jan 2006 14:46
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1882 bytes
The base way that a string of characters is handled in C and C++ is to provide a pointer to the beginning of the string. The way that memory is handled under Win32 is such that a memory address in one program is not a valid pointer to the same thing in another program. Therefore you cannot just pass a pointer to the string between programs in the way you do it between functions in the same program. However Windows provides a way to get around that limitation. Look at the help for the message WM_COPYDATA. For larger amounts of data look at memory mapped files. . Ed > David wrote in message > news:43c115e7@newsgroups.borland.com... > > This may sound like a dumb question but is it possible to send a string of > characters from one app to another using the windows API ?? > > Currently I am using files to do this but a more direct way would be > better.
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X-Google-Thread: 10cc67,f0b09784cee63bed X-Google-Attributes: gid10cc67,public X-Google-Language: ENGLISH,ASCII-7-bit From: "Ed Mulroy" <dont_email_me@bitbuc.ket> Newsgroups: borland.public.cppbuilder.nativeapi References: <43c115e7@newsgroups.borland.com> Subject: Re: Sending a character string as a message ? Date: Sun, 8 Jan 2006 09:46:04 -0500 Lines: 21 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.2670 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 X-RFC2646: Format=Flowed; Response NNTP-Posting-Host: 69.134.170.196 Message-ID: <43c1257f$1@newsgroups.borland.com> X-Trace: newsgroups.borland.com 1136731519 69.134.170.196 (8 Jan 2006 06:45:19 -0700) X-Authenticated-User: edmulroy Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!news3.google.com!news2.volia.net!solnet.ch!solnet.ch!news-out.usenet.com!propagator2-sterling.newsfeeds.com!in.nntp.be!caladan.landsraad.net!newsgroups.borland.com!not-for-mail