This problem comes from the grid control not having a row level valid method (like browse fields... valid...) Basically what you are doing is setting OldActiveRow in beforerowchange event and detecting the row change in afterrowchange event calling gridrowchange. Gridrowchange has to move the record poiner back to OldActiveRow do the validation and either return back to the new row or leave it on the old row if validation fails. A real kludge workaround, but the only way that I know that this can be done. I use similar code in my grids.