title: Check if an external application is running using wxWidgets
body: <p>I am looking for some <code>wxWidgets</code> function to check if an external application is running in the system. Something similar to <code>NSRunningApplications</code> in Cocoa.
  I looked at a lot of wxwidgets apis including wxProcess class but didn't find a way to do this. 
  Does anybody know a way to check if an external process is running in <code>wxWidgets</code> based on its name or application identifier (not pid).</p>