Ajax FilteredTextBox Extender

How To Use FilterTextBoxIn Asp.net.
SOURCE OF PAGE
Firstly Add  Directory on page
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit"  TagPrefix="asp" %> 
Only Restrict For Upper case
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager> 
<asp:TextBox ID="txtUpperCase" runat="server"/>
 <asp:FilteredTextBoxExtender ID="UpperCase" runat="server" TargetControlID="txtUpperCase"        FilterType="UppercaseLetters"> </asp:FilteredTextBoxExtender>
  OutPut-
Show UpperCase Letetr In Text box.
Only Restrict For Lower case
<asp:TextBox ID="txtLowerCase" runat="server"/>
<asp:FilteredTextBoxExtender ID="LowerCase" runat="server" TargetControlID="txtLowerCase"
  FilterType="LowercaseLetters"> </asp:FilteredTextBoxExtender>
OutPut-
    Show LowerCase Letetr In Text box .

Only Restrict For Numeric Value
<asp:TextBox ID="txtNumbers" runat="server"/
<asp:FilteredTextBoxExtender ID="Numbers"  runat="server"  TargetControlID="txtNumbers"     FilterType="Numbers" </asp:FilteredTextBoxExtender>
OutPut-
 Show Numbers In Text box
 To Restrict certain or special characters
<asp:TextBox ID="TextBox1" runat="server"/>
<asp:FilteredTextBoxExtender ID="Custome" runat="server" TargetControlID="TextBox1"
   FilterMode="InvalidChars"  InvalidChars="!@#$%^&amp;*()~?><|\';:">
</asp:FilteredTextBoxExtender>
OutPut-
InvalidChar Not Enter In Text box.We Can Give Valid Character Same like As Ex.