This function is available only in Windows, providing support for the RichEdit control, and only in scripts that use the Classic Agent.
GetFontSize returns the point size of a font being used in a rich edit control.
If the optional iLine and iCol arguments are not specified, then GetFontSize returns the point size of the font being used for newly inserted characters.
If iLine and iCol are supplied, then GetFontSize returns the point size of the font in which the specified character is displayed.