Hi Marina;

In that case, the column's "modified" flag wil be DataModified! but, you can still compare the value in the DWO"s "Original " buffer to the current"Primary* buffer. In your case A = A. If so, you can reset that columns status to "NotModified" via the SetItemStatus() command.

Regards ... Chris

Thank you Chris

Maybe also useful to look at the value of "DeletedCount()".

To add to what Chris and Miguel said, the best way to do this is as the PFC does it. Use IF dw_1.ModifiedCount() + dw_1.DeletedCount() > 0 THEN //dw data changed.

Hi Kevin,

Will it work if Original and Current buffers are compared with IF?



Does modified count do equality check internally between the buffers?



dwcontrol.Object.Data {.buffer } {.datasource } [ startrownum, startcolnum, endrownum, endcolnum ]



EQUAL



dwcontrol.Object.Data {.buffer } {.datasource } [ startrownum, startcolnum, endrownum, endcolnum ]

You could test that hypothesis, but I suspect the ModifiedCount() function checks each row's status to see if it is either NewModified! or DataModified! and adds 1 if true. To test, I would change a data value in a row/column, use SetItemStatus to change the status from DataModified1 to NotModified!, then see what ModifiedCount() returns.

If one could peek "under the covers" into the DataWindow engine, I would not be surprised to find that it keeps a running total of modified rows so that it does not have to examine each row's status. Comparison of the Original and Primary data buffers, even if doable or feasible, might incur significant overhead to construct and populate the buffer "objects", but that is but conjecture on my part.