Some GDI/GDI+ fun with the WinForms DataGrid control

I've published a new article on MSDN that details how you can add some nifty visual effects to the WinForms DataGrid control when dragging and dropping columns. Constructive criticism is more than welcome. I'm also looking for ideas for my next article, so if there's anything in the area of GDI/GDI+ that you're interested in seeing, please don't hesitate to let me know.