Currently AZERTY keyboards are not supported in NumericTextBox. In consequence: 1. It is not possible to enter a decimal separator in the control (because the key combination is "Shift + ;" - this can only be done using Caps Lock or the NumPad 2. It is possible to enter ; instead of the decimal separator 3. It is possible to enter the special symbols that are in the place of digits in QWERTY keyboards (again because digits are written using the Shift key).