Re: Is it possible to Read a Value from another EXE-file?

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#8980

From: Bob Gonder
Date: Thu, 26 Aug 2004 15:37

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PC Hua wrote:

>In my project there are 2 executable files A and B. I want to make sure 
>that the user has a copy of A when he runs B (just for license reason).
>Can I define data (for identification) in A which can be read from B?

Yes. As long as A isn't compressed (with PkLite or such).
Open the exe file (with CreateFile) with OpenExisiting and ReadOnly
attributes. And search for your data.  In the code for A, you would
have a unique string such as "ExeA==oK".  If you find the file, and it
contains your secret string, then all is fine.

>Alternatively, I will call A from B and A will return a value to identify 
>itself.
>How do I make A knows it's called by B so that A will only return a value 
>instead of running the program?

Pass a secret parameter.. "A.exe  ShowMeYourCode"
if( 0 == strcmp( argv[1], "ShowMeYourCode" ) )
	exit(MySecretCode);

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From: Bob Gonder <notbg@notmindspring.invalid>
Newsgroups: borland.public.cppbuilder.nativeapi
Subject: Re: Is it possible to Read a Value from another EXE-file?
Date: Thu, 26 Aug 2004 08:37:59 -0700
Organization: MindSpring Enterprises, Inc.
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