The property fieldLen specifies the number of single-byte characters that can be displayed in a text-form field. This value does not include the preceding attribute byte.
The value of fieldLen for numeric fields must be great enough to display the largest number that can be held in the field, plus (if the number has decimal places) a decimal point. The value of fieldLen for a field of type CHAR, DBCHAR, MBCHAR, or UNICODE must be large enough to account for the double-byte characters, as well as any shift-in/shift-out characters.
The default fieldLen is the number of bytes needed to display the largest number possible for the primitive type, including all formatting characters.
Related concepts
Overview of EGL properties
Related reference
Form part in EGL source format