pento the pen that will be used for drawing shadows when the palette mode is
#PALETTEMODE_PENand the current output device is a palette one. The palette mode can be set using SetPaletteMode().
When the palette mode has been set to
#PALETTEMODE_PEN, all Hollywood commands that draw a
shadow won't use the shadow color that has been set using SetFormStyle(),
SetFontStyle() or a
ShadowColor tag but they will use the pen that
has been set as the shadow pen using this function.
See SetPaletteMode for details.