I guess you have to load a unicode font first?...
Graphics 800,600,0
SetImageFont(LoadImageFont(getenv_("windir") + "\fonts\arial.ttf", 24, SMOOTHFONT))
SetBlend ALPHABLEND
SetColor 255,255,255
DrawText "Björn",20,20
Flip
WaitKey[edit]
Lummy...
[/edit]