How can a Custom List Field be made Read only i.e., the user should not be able to modify the field's value in edit mode of List Item.
Two options:1) You hide the field in the edit mode using a feature: see patrikluca.blogspot.com/.../...int-list-form.html2) You keep it visible in the edit mode, but you make it readonly: patrikluca.blogspot.com/.../...es-based-on_20.html
This is another approach mentioned in MSDN library that I came across msdn.microsoft.com/.../...field.readonlyfield.aspx