This simple .dll file, expands what is possable when designing in winforms. Make the standart winforms window, look more modern, and it only uses native winforms controls. Here is an example:
From this
To this
With only these few lines
There is much more than can be shown just here. Take a look at the wiki for more detailed info.
Pictures from another project: https://github.com/kris701/Auto-2048-8x8