| Implemented Interface | Description | 
|---|---|
| IBaseField2 | Represents a basic data field or entity, such as an attachment. | 
| IBaseField3 | Represents a basic data field or entity, such as an attachment. | 
| IBaseField4 | Represents a basic data field or entity, such as an attachment. | 
  LockObject | Locks the object. Returns True if the object has been changed on the server. | 
  Post | Posts all changed values into database. | 
  Refresh | Reads saved values, overwriting values in memory. | 
  Undo | Undoes changes to field values that have not been posted. | 
  UnLockObject | Unlocks the object. | 
  AutoPost | If true, the database is updated immediately when the field value changes. | 
  AutoUnlock | Indicates whether to make the item changeable to other users automatically after a Refresh or Post. | 
  DefaultValue | The default value of the parameter. | 
  Description | The parameter description. | 
  Field | The value of the specified field. | 
  FieldMultiValue | The MultiValue object of the specified field. | 
  ID | The item ID. | 
  IsLocked | Checks if object is locked for editing. | 
  IsUsed | Checks if the test parameter is used. | 
  Modified | Checks if the item has been modified since last refresh or post operation. If true, the field properties on the server side are not up to date. | 
  Name | The parameter's name. | 
  OwnerTest | The test that owns this parameter. | 
  TypeName | The field's type. | 
  Virtual | Checks if this is a virtual item, that is, an item that does not have a corresponding database record. |