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POset variable to cmd.exe
 

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    <p>Greeting earthmen,</p> <p>Here is my question:</p> <p>How can I create a program which sets variable to current session of cmd.exe e.g.</p> <pre><code>c:\&gt; set myvar Environment variable myvar not defined c:\&gt;myexe.exe c:&gt;set myvar myvar=myvalue </code></pre> <p>The only similar topic that I've found is this -</p> <p><a href="https://stackoverflow.com/questions/774047/how-can-i-change-windows-shell-cmd-exe-environment-variables-from-c+c">How can I change Windows shell (cmd.exe) environment variables from C++?</a></p> <p>But I didn't get a single word from this:</p> <blockquote> <p>There is a way... Just inject your code into parent process and call SetEnvironmentVariableA inside cmd's process memory. After injecting just free the allocated memory.</p> </blockquote> <p>While C/C++ is not my "native" language I've felt myself completely lost when I've searched google with "c++ inject code" and etc... Is there an article where I can get more info about this.</p> <p>BTW now I'm using one a little bit stupid workaround.As the setting a variable to </p> <p>HKEY_CURRENT_USER\Environment</p> <p>and </p> <p>HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment</p> <p>is comparatively easy I'm just recording similar variable to the registry:</p> <pre><code>load.temp.vars=set myvar1=myval1&amp;set myvar2=myval2&amp; .... </code></pre> <p>and then just call %load.temp.vars% and it will be executed as a command: </p> <pre><code>c:/&gt;%load.temp.vars% c:/&gt;set myvar1 myvar1=myval1 </code></pre> <p>It works fine bu it's not good enough for me :)</p> <p>Live long and prosper, \\//_</p>
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    1. COpossible duplicate of [Is it possible to change the Environment of a parent process in python?](http://stackoverflow.com/questions/263005/is-it-possible-to-change-the-environment-of-a-parent-process-in-python)
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