When set, replaces an entire record of text in the grid at once. You must set DATA-COLUMNS beforehand to denote where each column's data starts. You must also set the Y property to indicate which row you want to overwrite. If you specify a row that is past the current end of the grid, the effect is the same as adding a new record at that point. Otherwise, the row's existing record is overwritten with the new one.
When inquired, RECORD-DATA returns the data contained in the row identified by property Y. This data is formatted according to DATA-COLUMNS. If the requested row does not exist, the returned value will be entirely spaces.