Hi, I have 2 drop down lists, and I want to populate the content of the second drop down list according to the selected value from the first drop down list. May I know for VB.NET, how shall I specify that my second drop down list is being populated upon changes of selection from first drop down list? Below is the HTML code for my first drop down list. <asp:DropDownList id="selCompanyName" style="Z-INDEX: 107; LEFT: 136px; POSITION: absolute; TOP: 32px" runat="server" DataTextField=" Company_Name" DataValueField="GW_Acct_Id" AutoPostBack="True"></asp:DropDownList> Code (markup): Is that I need to add an attribute namely "onSelectedIndexChanged" here? And if yes, what if I would like to call a function from VB.NET code-behind upon the selection of the first drop down list? Is it like <asp:DropDownList id="selCompanyName" style="Z-INDEX: 107; LEFT: 136px; POSITION: absolute; TOP: 32px" runat="server" DataTextField=" Company_Name" DataValueField="GW_Acct_Id" AutoPostBack="True" [B]onSelectedIndexChanged="<%#FunctionName()%>"[/B]></asp:DropDownList> Code (markup): Kindly advice. Thanks.