This property indicates, in bytes, the actual length of a field’s value.
var = field.ActualSize
Returns a Long value.
Use the ActualSize property to return the actual length of a Field object’s value. For all fields, the ActualSize property is read-only. If ADOCE cannot determine the length of the Field object’s value, the ActualSize property returns -1 (adUnknown).
For character data types, it may be useful to use DefinedSize to determine the maximum size permitted.