dynamic creation of password in C# code behind

Question

how can i create a password field instead of textbox field.Thank you

 

case "TextBox":

ctl = new System.Web.UI.WebControls.TextBox();

this.AppendEvent(ctl, ci.EventHandler);

break;

case "Password":

ctl = new System.Web.UI.WebControls.TextBox();

this.AppendEvent(ctl, ci.EventHandler);

break;