title: Batch file extract string part
body: <p>I have this window's batch command:</p>
  
  <pre><code>wmic process call create "notepad.exe" | find "ProcessId"
  </code></pre>
  
  <p>It returns this string</p>
  
  <pre><code>(spaces)  ProcessId = 13764;
  </code></pre>
  
  <p>And I need to store in a variable only the pid number (13764), how can I do?</p>