Guide / Example / Tutorial about create Slate forms like the UE4 Launcher?

Is there a guide or tutorials or someone can do a example of how to use the Slate to create a forms to use the UE4 as launcher for the game ?

I would like to see an example of the form with the custom border (without the windows window border) and a Hello World button in the middle.

This can be used for the public or have problems with the license ?