import System;
import System.IO;
import System.Windows.Forms;
import Sony.Vegas;
import ScriptPortal.Vegas;

try
{
  for (var trackEnum = new Enumerator(Vegas.Project.Tracks); !trackEnum.atEnd(); trackEnum.moveNext())
    for (var eventEnum = new Enumerator(Track(trackEnum.item()).Events); !eventEnum.atEnd(); eventEnum.moveNext())
    if (!eventEnum.item().Selected)
      for (var regionEnum = new Enumerator(Vegas.Project.Regions); !regionEnum.atEnd(); regionEnum.moveNext())
        if (eventEnum.item().Start < regionEnum.item().End &&
                eventEnum.item().End > regionEnum.item().Position)
            {
               eventEnum.item().Selected = true;
               break; // breaks region loop, continues on next event
            }
}
catch (e)
{
 Vegas.ShowError(e);
}