.Map :: MoHAA Mapping

how I can create a window, I already followed the tutorial but I cannot make a window.

Somebody could say to me, how to make windows but in a simple form?

Select a window textured brush. Then right click in the 2d window of the editor and click on func > window.

another thing, where I can see the textures in form of grates, like those of the jail.

That little box that you can type in towards the top in radiant........... type metal in it and hit enter