title: Drawing lines in a DataGridView through rows
body: <p>I'm trying to draw lines through rows in a DataGridView. The idea is to complete a Gantt Chart. By now I'm able to draw the bar column. But when a task is preceded by another, I need to draw the line connecting them.</p>
  
  <p>This is where I am now:<img src="https://i.stack.imgur.com/M9jnf.png" alt="enter image description here"></p>
  
  <p>What I need is to draw the connector as, for example, "Tarea 6" and "Tarea 7" in the ellipse</p>
  
  <p><img src="https://i.stack.imgur.com/3dKGP.png" alt="enter image description here"></p>