title: RoboCopy - Files starting with a dash result in error
body: <p>We are in the process of migrating files from one share to another. We have built a tool in which the user can select directories and/or individual files to be copied to a destination share. The tool generates an individual RoboCopy command for each of the files or directories in the collection that results from the selection made by the user.</p>
  
  <p>We are having problems if an individual file to be copied starts with a dash, for instance:</p>
  
  <pre><code>robocopy c:\temp c:\temp2 -a.txt
  </code></pre>
  
  <p>RoboCopy bails out with: ERROR : Invalid Parameter #3 : "-a.txt"
  We tried the usual suspects (quotes around the filename etc.), but so far nothing seems to work. Any idea how to get around this, without resorting to renaming the file prior to copying?</p>