title: How to draw a colored line to the left of a TMemo which looks like a gutter
body: <p><em>Need a component derived from TMemo (not TSyn components)</em></p>
  
  <p>I need a line to the left(inside or outside) of a TMemo whose thickness(optional) and color can be controlled just for the purposes of indication. It need not be functional as a gutter but looks like one especially like that of a SynMemo as shown in the image. The problem with SynMemo is that it doesn't support variable width fonts like Tahoma but the TMemo does.  </p>
  
  <p><a href="https://i.stack.imgur.com/3QUUz.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3QUUz.jpg" alt="enter image description here"></a></p>
  
  <p>I tried making a few composite components with CustomContainersPack by combining a TShape with TMemo, even superimposing a TMemo on top of TSynMemo but didn't succeed as the paint while dragging made it look disassembled and CCPack is not that robust for my IDE.</p>
  
  <p>KMemo, JvMemo and many other <a href="https://torry.net/" rel="nofollow noreferrer">Torry.net</a> components were installed and checked for any hidden support for achieving the same but none worked.</p>
  
  <p>Grouping of components together is also not a solution for me since many mouse events are tied to the Memo and calls to FindVCLWindow will return changing components under the mouse. Furthermore many components will be required so grouping with TPanel will up the memory usage. </p>