Question: I have a Windows Media Player-Compononent. I want it to fill the whole form except a line at the bottom for some buttons and Text. So Dock-> Fill minus the part at the bottom but when resized, the part at the bottom should resize to left and right but stay at the bottom and the Windows Media Player-Compononent should resize with the form but keep the distance at the bottom.

Answer: 
Add a panel set its dock to `Bottom`, then add a Media(whatever) component set its dock to `Fill`. You're done.
For anyone else having this issue: 

I had 2 panels stacked `panel1` was fill, `panel2` was bottom docked. It looked like it worked but text would appear off `panel1` down under `panel2`.

I fixed this with the [padding property](https://msdn.microsoft.com/en-us/library/ms229627(v=vs.110).aspx). I added `20 padding` to the bottom of `panel1` and all was fixed.