I've found a bug, it's strange but it's working if i remove a parameter.
I'm french and i've got an application made since year and use Telerik 2017.3 (same in recent) the problem was found by a user who use "point" in numeric pad.
I know this problem was resolved since years, and other website in my society. but i've searched why is again present. and make sample to find difference and remove parameter by parameter of RadNumericTextbox to find who blocked :
Originale code
<telerik:RadNumericTextBox ID="rntbMontantMensuel" runat="server" Enabled="true" IncrementSettings-InterceptArrowKeys="False" IncrementSettings-InterceptMouseWheel="False" DataType="Currency" ShowSpinButtons="false" MinValue="0" NumberFormat-DecimalDigits="2" RenderMode="Auto" EnabledStyle-Width="220px" EmptyMessage="0 " EnabledStyle-HorizontalAlign="right" FocusedStyle-HorizontalAlign="right" ReadOnlyStyle-HorizontalAlign="Center" HoveredStyle-HorizontalAlign="right" Type="Currency" AutoPostBack="true" ClientEvents-OnFocus="disableValide" ClientEvents-OnBlur="enableValide" NumberFormat-KeepNotRoundedValue="True"></telerik:RadNumericTextBox>
Code worked :
<telerik:RadNumericTextBox ID="rntbMontantMensuel" runat="server" Enabled="true" IncrementSettings-InterceptMouseWheel="False" DataType="Currency" ShowSpinButtons="false" MinValue="0" NumberFormat-DecimalDigits="2" RenderMode="Auto" EnabledStyle-Width="220px" EmptyMessage="0 " EnabledStyle-HorizontalAlign="right" FocusedStyle-HorizontalAlign="right" ReadOnlyStyle-HorizontalAlign="Center" HoveredStyle-HorizontalAlign="right" Type="Currency" AutoPostBack="true" ClientEvents-OnFocus="disableValide" ClientEvents-OnBlur="enableValide" NumberFormat-KeepNotRoundedValue="True"></telerik:RadNumericTextBox>
Yes if i've IncrementSettings-InterceptArrowKeys="False"
when user press "." in numeric pad, i've got an icon "block" (red cross inside circle) and don't change my point to coma (French decimal separator)