title: VBA - Concatenate columns on the first column
body: <p>I want to concatenate columns but in the first column in VBA, like that :</p>
  
  <pre><code>A         | B         | C         |
  sentence1 | sentence2 | sentence3 |
  sentence4 | sentence5 | sentence6 |
  sentence7 | sentence8 | sentence9 |
  </code></pre>
  
  <p>-></p>
  
  <pre><code>A                             | B       | C      
  sentence1 sentence2 sentence3 | nothing | nothing
  sentence4 sentence5 sentence6 | nothing | nothing
  sentence7 sentence8 sentence9 | nothing | nothing
  </code></pre>
  
  <p>How can I do ?
  Thanks in advance !</p>