title: Many histograms with VBA macro
body: <p>I recorded a macro that creates a histogram. The code is this</p>
  
  <pre><code>Sub histcreate
  
    Application.Run "ATPVBAEN.XLAM!Histogram", ActiveSheet.Range( _
      "$A$3:$A$1601"), ActiveSheet.Range("$BH$1"), , False, False, True, _
      True
  End Sub
  </code></pre>
  
  <p>I want to modify this macro, so that it creates not only this one histogram, but 50 histograms with ranges </p>
  
  <pre><code>"$B$3:$B$1601"  
  "$C$3:$C$1601"
  </code></pre>
  
  <p>and so on. I think I should use a for loop, but I don't know how to loop through letters. 
  Thank you!</p>