Font scaling on Windows

Hi,

I have been trying to understand how font
scaling(Format->Chracter->Position) works in Windows. This is my
understanding so far:
Consider the font preview window: First a LOGFONT with width=0 is
created. Then CreateFontIndirect is called which searches for a font
according to the criteria mentioned here
:https://msdn.microsoft.com/en-us/library/windows/desktop/dd145037(v=vs.85).aspx
. After that the 100% width is obtained from the new log font and is
scaled by the scaling factor. And eventually again  a new LOGFONT is
created with the lfWidth( which is the average char width of the font
) equal to our scaled width. Finally, this is the font set into the
device context and used in layout and drawing.
After choosing the scaling and closing the font preview window, a
SwFntObj with the scaled width is created ( in CreatePrtFnt ). This
font is used in further layout related functions.

Can anyone confirm if my understanding of the process is correct. Also
am I missing anything?

Regards,
Akash