I am having a RadAutoCompleteBox and RadTextBox in one of my pages. My requirement is that I must be able to select only one value from the dropdown that must be shown in a desired color and after selecting the item from the drop-down, I want my textbox to be focussed.
You can set the TextSettings SelectionMode to Single so that only one value can be selected from the drop-down. You can use the OnClientDropDownClosed event to change the focus to the RadTextBox once a value is selected from the drop down.