title: Waiting until a process created by calling a batch file has completed
body: <p><code>MyFile1.bat</code> invokes <code>MyFile2.bat</code> twice:</p>
  
  <pre><code>start MyFile2.bat argA, argB, argC
  start MyFile2.bat argX, argY, argZ
  </code></pre>
  
  <p>At this point, how can I wait until both processes spawned by the calls to <code>MyFile2.bat</code> have completed?</p>