NumericUpDownExtender buttons same height as the textbox - asp.net

Question

I'm using the NumericUpDownExtender control, but my buttons on the side of the textbox are bigger then my textbox, is there a way to make the buttons the same height as my textbox?
Edit: I found my problem. I was using the standard buttons, which can't be handled?. Now I've created custom ones, but they won't appear on each other, but next to each other.
my code:
<asp:TextBox ID="txtHerst" runat="server" Text="0" Style="text-align: center"></asp:TextBox><cc1:NumericUpDownExtender ID="extHerst" runat="server" TargetControlID="txtHerst"
Width="50" Enabled="True" Maximum="1.7976931348623157E+308" Minimum="-1.7976931348623157E+308"
RefValues="" ServiceDownMethod="" ServiceDownPath="" ServiceUpMethod="" Tag=""
TargetButtonDownID="imgBtnDown" TargetButtonUpID="imgBtnUp"></cc1:NumericUpDownExtender><asp:ImageButton ID="imgBtnUp" runat="server" ImageUrl="Images/up.jpg" /><asp:ImageButton ID="imgBtnDown" runat="server" ImageUrl="Images/down.jpg" />`

Answer 1

You should be able to use css to do that...

Answer 2

I encountered the same problem, and eventually replaced the extender to RangeValidator.

Answer 3

first all of you should create some Css.
<style type="text/css">
.auto-style1 {
width: 78px;
}
.auto-style2 {
height: 5px;
width: 19%;
}
</style>
So, in my case I've created a table and set the columns with the controllers and buttons that need it, works for me
<table border="1">
<tr >
<td class="auto-style1" ><asp:TextBox ID="TextBox1" runat="server" Width="100%" Text='<%# Bind("Secuencia") %>' Height="18px"></asp:TextBox></tdstyle="width=70%> </td>
<td class="auto-style2" >
<asp:ImageButton ID="up" runat="server" style="max-height:100%; max-width:100%" ImageUrl="~/Imagenes/up.gif" Width="10px" />
<asp:ImageButton ID="down" runat="server" style="max-height:100%; max-width:100%" ImageUrl="~/Imagenes/down.gif" Width="10px" />
</td>
</tr>
</table>
<ajaxToolkit:NumericUpDownExtender ID="NumericUpDownExtender1" Width="20" runat="server"
TargetButtonUpID="up" TargetButtonDownID="down" TargetControlID="TextBox1" />