The TBPUT service updates the current row of a table.
For tables with keys, the current contents of the key variables, dialog variables that correspond to keys in the table, must match the key of the current row, pointed to by the current row pointer (CRP). Otherwise, the update is not performed.
For tables without keys, the row pointed to by the CRP is always updated.
If the update was successful, the CRP remains unchanged. It continues to point to the row that was updated. The current contents of all dialog variables that correspond to columns in the table are saved in the row.
Additional variables not specified when the table was created, can also be saved in the row. These "extension" variables apply only to the row, not to the entire table. Whenever the row is updated, the extension variables must be specified again if they are to be rewritten.