Font-Size

The Font-size specified  in the CALL  PC_PRINTER_SET_FONT determines how many lines can be written on one page.

But I observed, that also the Font-Family determines the vertical advancing. With the same  Font-size 12 I can print 59 lines using "MS LineDraw"  but  64 lines using "Lucida Console".

Where can I read the real hight of a font or lines per page? 

Although both have the same Font-size 12  Lucida only needs 0.4219 mm  for each line while LineDraw Needs 0.4508 mm.

Is there a method to know these values for any font, or is it necesary to try it?

thanks for any help.

Rolf