title: Change mouse cursor when over certain components without affecting other cursor-setting code
body: <p>I'm using an ancient precursor to the DevExpress QuantumGrid (MasterView) in Delphi XE2 and would like certain cells to effectively act as hyperlinks (change the mouse cursor from crDefault to crHandPoint when over them and trigger an action on click).</p>
  
  <p>The configuration of the grid component is such that individual cells are not their own component, and I will need to find the cell from the mouse cursor coordinates and set the cursor from there.</p>
  
  <p>I think I need to set a few events on my grid object to achieve this, but I'm a little uncomfortable about how these events will interact with code that sets the cursor to an hourglass when doing long-running operations (currently handled using IDisposible to set the cursor back to original when finished) and want to double-check whether there's a better way of doing this before I get started and then find a tonne of edge-cases that leave the mouse cursor in the wrong state.</p>
  
  <p>I think I need to override:</p>
  
  <ul>
  <li>omMouseMove - get XY co-ordinates and set the cursor to hand/arrow</li>
  <li>onMouseDown - get XY co-ordinates and 'activate' hyperlink if present (possibly revert to arrow? The hyperlink will usually open a new window and the code called may change the cursor to an hourglass)</li>
  <li>onMouseLeave - reset cursor to arrow (this event isn't actually exposed, so
  think I'll need to handle messages manually)</li>
  </ul>
  
  <p>This kind of functionality comes as default on a TButton, but I couldn't see in the VCL how it's achieved at first glance, and may be a feature of the underlying Windows control.</p>