Hi Brain,
You can restrict the NumericUpDown cell, by using the NumericUpDown class. Here is the code snippet
gridControl1[rowIndex, colIndex + 2].NumericUpDown = new GridNumericUpDownCellInfo(100, 5000, 100, 100, false);
And you can able to cancel the editing, by using the KeyDown, KeyPress Events. Kindly refer to sample for details
Let me know if you need futher assistance,
Regards
Madhan
Forum_39574_18Jan06.zip