Just upgraded to Vista and now when trying to access elements with the FindControl inside your Dialog boxes items are not found.

<asp:UpdatePanel ID="UpdatePanel6" runat="server">
<ContentTemplate>
<eo:Dialog ID="SchoolNameDL"
runat="server"
Height="60px"
Width="376px"
AllowResize="True"
BorderColor="#335C88"
BorderStyle="Solid"
BorderWidth="1px"
CloseButtonUrl="00070101"
ControlSkinID="None"
HeaderHtml="School Name"
MinimizeButtonUrl="00070102"
ResizeImageUrl="00020014"
RestoreButtonUrl="00070103"
ShadowColor="LightGray"
ShadowDepth="3"
BackShadeColor="LightGray"
BackShadeOpacity="35">
<ContentTemplate>
<table id="NewSchoolTbl" runat="Server">
<tr>
<td>Name:</td>
<td style="width:20px;"></td>
<td style="width: 306px"><asp:TextBox ID="NewSchoolName" runat="server" Width="270px"></asp:TextBox></td>
</tr>
<tr>
<td valign="top"></td>
<td style="width:20px;"></td>
<td style="width: 306px">
<asp:Button ID="AddSchoolName" runat="server" Text="Add Name" OnClick="AddSchoolName_Click" />
</td>
</tr>
</table>
</ContentTemplate>
<HeaderStyleActive CssText="padding-right: 4px; padding-left: 4px; font-size: 11px; background-image: url(00070104); padding-bottom: 3px; padding-top: 3px; font-family: tahoma" />
<FooterStyleActive CssText="background-color: #e5f1fd; padding-bottom: 8px;" />
<ContentStyleActive CssText="border-top: #335c88 1px solid; background-color: #e5f1fd" />
</eo:Dialog>
</ContentTemplate>
</asp:UpdatePanel>


Code Behind
protected void AddSchoolName_Click(object sender, EventArgs e)
{
TextBox NewSchoolName = (TextBox)SchoolNameDL.FindControl("NewSchoolName");
string TmpSchoolName = NewSchoolName.Text;
}

Error Message
Object reference not set to an instance of an object

eo_support,

Thanks for the quick reply. That did fix my problem but I did not have to do this until I upgraded to Vista. I'll scan my project and update all my references.

Thanks