SPFieldTypeDefinition.FieldEditorUserControl property
SharePoint 2013
Gets the server-relative path to the control to use as a field editor control for the field type.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Property value
Type: System.StringA string that contains the server-relative path to the .ascx file of the control, for example, /_controltemplates/LookupFieldEditor.ascx.