twips per pixel

[badgers]

I have a question.
I used to believe that twips per pixel was 15.
I have tested this on several machines here at work.
Trinitron Multiscan 500PS monitor.
when set to 1600X1200 VB gives me 12 twips per pixel.
all other resolutions below this give me 15 twips per pixel.

they are equal values for X and Y
what gives.
NT4.0 SP5 VB6 SP3
Compaq Deskpro
integrated video, I don't know the make of the chip set.
Guessing ATI rage but it is just a guess.
21" monitor
anyone else see this happen?

use these to get the Twips Per Pixel

Screen.TwipsPerPixelX
Screen.TwipsPerPixelY

[badgers]

i know that.
My point is that I thought that twips per pixel was a constant. It appears that it is not.
Is my system lying or am I wrong in thinking that twips per pixel is constant.

[Frans C]

Changing the system font settings will change the number of twips per pixel. There's a difference between large fonts, small fonts and (of course) custom size fonts. You can set these in the desktop properties(right click on desktop --> properties --> Settings --> Advanded --> Font Size)

[badgers]

thanks for the info!
small fonts=15 Tpp
large fonts=12 Tpp