vValue = oTable.GetColPrivateData(col)
|Col||(Long) If the value is greater or equal 0 then it is a index of the column (zero-based index, counted including the fixed part). |
Value -2 means the last column.
The value is neither displayed in the table nor used internally. The designer of the application can use it as needed.
The value can be used, for example, for storin auxiliary information. The value is Empty after initialization.
The value is stored permanently, even after transfer, delete, etc.