b = delcase
function marks a case for deletion in an external file.
The dictionary_name must be supplied and refers to an external dictionary associated with your application.
The optional list of ID variables, id1 ... idN, specifies the list of variables that will identify the case to delete from the external file. Each of the variables in the list must be defined in a dictionary or working storage. The combined length of the variables in the list must equal the length of the case IDs defined for the external dictionary. The function concatenates the variables in the ID list to form a string. It then deletes from the external file the case whose case identifier matches the string constructed from the list.
If no ID list is provided, the current values of the ID items for the external dictionary are used.
The function returns a logical value of 1 (true) if the case existed and was successfully marked for deletion and 0 (false) otherwise.