Non-blank required fields

A field with a 'required' validator, still allows all spaces. So, if I open an edit form and put all spaces in a required field and save, the record will save. When i return to the list screen, that record does not appear.
so question is...can a 'no all spaces' validator be created in the fields.ini file, or is a custom validation function needed ?
thanks once again steve, you have been a tremendous help.
so question is...can a 'no all spaces' validator be created in the fields.ini file, or is a custom validation function needed ?
thanks once again steve, you have been a tremendous help.