what i want to do is to create a member variable of type double that is in a textbox, so i figured i would make a new class DRTextbox that would inherit all of textboxs property. So in the codebehind file in which i want to use this i did.<BR> public class DRTextBox : TextBox<BR> {<BR> public DRTextBox() : base() {}<BR> public double textvalue;<BR> }<BR>I assume that would inherit what i needed? and then i would be able to make a &#060;asp:DRTextBox and that would work and well it does not so Im assuming that i am way off mark on this. <BR>I tried to searched on howto inherit like this but couldnt&#039; find anything useful if someone has a link or any input it would be much appreciated. <BR>Thanks.<BR>Ryan