This example mimics a network configuration dialog. Each RadMaskedTextBox instance uses the numeric range mask part. The user is not allowed to input values outside of a preset range.

<rad:RadMaskedTextBox
   id="RadMaskedTextBox1"
   runat="server"
   Mask="<0..255>.<0..255>.<0..255>.<0..255>"
   Skin="Windows"
/>