From Xojo Documentation
Used by many RectControl classes to set the TextUnits property. This is the unit in which the font size is specified for the control.
The FontUnits enum has the following values:
|0||Default||An appropriate cross-platform selection. On Macintosh, font units is in points, on Windows it is in pixel size, and on Linux it is a scale Point size. This is a legacy carry-over from the days where the TextSize of 12 was the default and 12 was assumed to be the standard font size on each platform.|
|1||Pixel||Units are pixels.|
|2||Point||Units are points.|
|3||Inches||Units are inches.|
|4||Millimeter||Units are millimeters.|
This feature works on Windows, Mac, and Linux.
Setting the units to pixels for a TextArea control: