FTP button font ??

[nanochip]

I do image recognition to detect some of the buttons in the FullTiltShortcuts program, and I have found that a few users have a different font on their buttons on a Full Tilt table - like the "Wait for Big Blind" button. This (obviously) messes up the image recognition. Can anyone tell me what font is usually used for these buttons, where it is stored at, and how some user's might have a different font used for their buttons (even though they say they are using an un-modified table)? Is this a standard windows font that might be missing from their system?
Thanks,
nano

(I've searched thru the huge FTP mods thread and couldn't find this answer).