title: Concatenate env variable value with string in command line
body: <p>This is Windows 7 command prompt question.</p>
  
  <p>Suppose I have environment variable which were set in a next way:</p>
  
  <pre><code>set FILE_SRC="D:\Users\me\Documents and Settings"
  </code></pre>
  
  <p>I would like to call form command line utility which will get one of directory files as argument:</p>
  
  <pre><code>fooUtil.exe %FILE_SRC%\fileName.txt
  </code></pre>
  
  <p>In this case shell fails to construct correct path string. Instead of it utility get next argument:</p>
  
  <pre><code>"D:\Users\me\Documents and Settings"\fileName.txt
  </code></pre>
  
  <p>What is a correct way? Again, I talk about prompt command line and not a batch file. </p>