gnuplot windows & png term issue: font

[Sebastian P. <spc...@gm...>]

Hello

I have two problems related to fonts in gnuplot:

1. How can I change font family in the command for win terminal?

I've tried:
set term windows font "Courier New" 12
set term windows font "Courier" 12
set term windows font "cour" 12
set term windows font "cour.ttf" 12
set term windows font "C:/WINDOWS/Fonts/cour.ttf" 12

but none from above works (but 1st command works for emf term..
strange). Gnuplot says font is changed but when I replot I still have
default font (probably Arial or similar)

2. How can I set encoding in png terminal to see polish letters like
"ą" "ę" "ś" etc.

I've tried:
set encoding utf8
set encoding cp1250

there is no effect, I see only strange signs instead of letters

Sebastian Pająk