Please make a new thread for each question you have.
I make this function private in the next update, because it is easier to change the properties this way:
AS_TextFieldAdvanced_5.Title.xFont = xui.CreateDefaultBoldFont(15)
AS_TextFieldAdvanced_5.Title.FocusedTextColor = xui.Color_White
For the last parameter you need the title label, but this is not publicly available.