Hello, Rumen!

I found the same solution (little differences from yours)  and I was writing you but suddenly I got your message =)

Thank you for your job!

Hello Svetlana,

So I dug further into this and I think I have a solution that works fine. It gets a little bit more complicated than my original idea though, you will need a couple of additional changes.

1. Implement BeforeRowTemplateOpenHandler client side handler, in addition to BeforeRowTemplateCloseHandler

 <ClientSideEvents BeforeRowTemplateOpenHandler="beforeRowTemplateOpen" BeforeRowTemplateCloseHandler="beforeRowTemplateClose" />

2. The javascript now becomes something similar to this:

    <script type="text/javascript">


        var globalCancel;

        function beforeRowTemplateOpen()
        {
            globalCancel = false;
        }

        function beforeRowTemplateClose(grid, row, save)
        {
            if (!save && !globalCancel)
            {
                return true;
            }
        }   
   
    </script>

3. Modify the autogenerated "Cancel" button onclick event handler to:

<input id="igtbl_reCancelBtn" onclick="globalCancel=true; igtbl_gRowEditButtonClick(event);"
    style="width:50px;" type="button" value="Cancel">
</input>

This does the trick. Here is the whole ASPX I have, for your convenience:

 <asp:AccessDataSource ID="AccessDataSource1" runat="server"
        DataFile="~/App_Data/Nwind.mdb"
        SelectCommand="SELECT [CustomerID], [CompanyName], [ContactName] FROM [Customers]">
    </asp:AccessDataSource>
   
    <igtbl:UltraWebGrid ID="UltraWebGrid1" runat="server"
        DataSourceID="AccessDataSource1" Height="200px" Width="325px">
        <bands>
            <igtbl:UltraGridBand>
                <Columns>
                    <igtbl:UltraGridColumn BaseColumnName="CustomerID" IsBound="True"
                        Key="CustomerID">
                        <Header Caption="CustomerID">
                        </Header>
                    </igtbl:UltraGridColumn>
                    <igtbl:UltraGridColumn BaseColumnName="CompanyName" IsBound="True"
                        Key="CompanyName">
                        <Header Caption="CompanyName">
                            <RowLayoutColumnInfo OriginX="1" />
                        </Header>
                        <Footer>
                            <RowLayoutColumnInfo OriginX="1" />
                        </Footer>
                    </igtbl:UltraGridColumn>
                    <igtbl:UltraGridColumn BaseColumnName="ContactName" IsBound="True"
                        Key="ContactName">
                        <Header Caption="ContactName">
                            <RowLayoutColumnInfo OriginX="2" />
                        </Header>
                        <Footer>
                            <RowLayoutColumnInfo OriginX="2" />
                        </Footer>
                    </igtbl:UltraGridColumn>
                </Columns>
                <RowEditTemplate>                   
                    <p align="right">
                        CustomerID&nbsp;<input id="igtbl_TextBox_0_0" columnkey="CustomerID"
                            style="width:150px;" type="text">
                            <br>
                                CompanyName&nbsp;<input id="igtbl_TextBox_0_1" columnkey="CompanyName"
                                    style="width:150px;" type="text">
                                    <br>
                                        ContactName&nbsp;<input id="igtbl_TextBox_0_2" columnkey="ContactName"
                                            style="width:150px;" type="text">
                                            <br>
                                            </br>
                                        </input>
                                    </br>
                                </input>
                            </br>
                        </input>
                    </p>
                    <br>
                        <p align="center">
                            <input id="igtbl_reOkBtn" onclick="igtbl_gRowEditButtonClick(event);"
                                style="width:50px;" type="button" value="OK">
                                &nbsp;
                                <input id="igtbl_reCancelBtn" onclick="globalCancel=true; igtbl_gRowEditButtonClick(event);"
                                    style="width:50px;" type="button" value="Cancel">
                                </input>
                            </input>
                        </p>
                    </br>
                 </RowEditTemplate>
                <RowTemplateStyle BackColor="White" BorderColor="White" BorderStyle="Ridge">
                    <BorderDetails WidthBottom="3px" WidthLeft="3px" WidthRight="3px"
                        WidthTop="3px" />                       
                </RowTemplateStyle>               
                <addnewrow view="NotSet" visible="NotSet">
                </addnewrow>
            </igtbl:UltraGridBand>
        </bands>
        <displaylayout bordercollapsedefault="Separate"  AllowUpdateDefault="RowTemplateOnly"
            name="UltraWebGrid1" rowheightdefault="20px" version="4.00">
            <ClientSideEvents BeforeRowTemplateOpenHandler="beforeRowTemplateOpen" BeforeRowTemplateCloseHandler="beforeRowTemplateClose" />
            <framestyle borderstyle="Solid" borderwidth="1px" font-names="Verdana"
                font-size="8pt" height="200px" width="325px">
            </framestyle>
            <pager>
                <PagerStyle BackColor="LightGray" BorderStyle="Solid" BorderWidth="1px">
                <borderdetails colorleft="White" colortop="White" />
                </PagerStyle>
            </pager>
            <editcellstyledefault borderstyle="None" borderwidth="0px">
            </editcellstyledefault>
            <headerstyledefault backcolor="LightGray" borderstyle="Solid">
                <borderdetails colorleft="White" colortop="White" />
            </headerstyledefault>
            <rowstyledefault backcolor="White" bordercolor="Gray" borderstyle="Solid"
                borderwidth="1px" font-names="Verdana" font-size="8pt">
                <padding left="3px" />
                <borderdetails colorleft="White" colortop="White" />
            </rowstyledefault>
            <addnewbox>
                <boxstyle backcolor="LightGray" borderstyle="Solid" borderwidth="1px">
                    <borderdetails colorleft="White" colortop="White" />
                </boxstyle>
            </addnewbox>
            <activationobject bordercolor="" borderwidth="">
            </activationobject>
        </displaylayout>
    </igtbl:UltraWebGrid>
   
    <script type="text/javascript">


        var globalCancel;

        function beforeRowTemplateOpen()
        {
            globalCancel = false;
        }

        function beforeRowTemplateClose(grid, row, save)
        {
            if (!save && !globalCancel)
            {
                return true;
            }
        }   
   
    </script>

 Thank you very much for your answer!

No, it's not possible to remove button "Close". I would like it to work )