Font size when crossing platforms

[David Mendriski]

I have just written an application using Dreamcard 6.5.1 which drills  
Italian verbs in all forms.  I was very pleased with its appearance  
on my Imac G5.  I gave it to a classmate in my Italian class with a  
copy of DreamCard Player for PCs.  When it opened on her computer,  
the size of the card exceeded the size of her screen, losing its  
edges, altho it is simply centered on mine.  The textfields were the  
original size, but the font in those fields shrank down to barely  
visible.  They were 14 point fonts on my computer.  I also tried to  
create a menubar from the menubar creator.  If Mac format is NOT  
checked  the menuitems appear in the upperleft corner of the card in  
a small font and can be selected and opened. If Mac format is  
selected, the items appear in REV's Menubar instead of Rev's menubar   
and the items (eg FILE or HELP) highlite  if selected but their  
existing contents do not open or get exposed.  Can anyone PLEASE  
suggest what I am doing wrong?