FONTNAME becomes the font for the current drawing surface. The default
size is not changed. The font can be set to any currently enabled Windows fonts
(see the relevant Windows font manager). Care should be taken when selecting
fonts since fonts that are available on one machine may not be available on
FONTNAME could be a user-added Windows font or 'SYSTEM FIXED FONT' (this font is
used for output to a ClearWin window) or 'SYSTEM FONT' (this is the
Windows SYSTEM_FONT parameter or, under Windows 95, the DEFAULT_GUI_FONT
parameter and is used in some ClearWin+ controls).