POINTQF structure ?

Hello,

In STROBJ_bGetAdvanceWidths function there is parameter POINTQF which gives
array of POINTQF structures. I am using this function to get the width of the
glyphs in the string which I get in DrvTextOut function hook. Can anybody
tell
me how to get width of the gluph from this POINTQF structure ?. This
structure
has two LARGE_INTEGER members which are 64 bit in length and DDK MSDN says
it's
in (28.36, 28.36) format. What is this format ?

FUNCTION :
BOOL STROBJ_bGetAdvanceWidths(
IN STROBJ *pso,
IN ULONG iFirst,
IN ULONG c,
OUT POINTQF *pptqD
);





Thanks and regards