Can you import user32.dll on a 64-bit system?

[MarkT]

I have read only richtext box which I would like to also hide the caret. The only suggestions I have seen to do this is import the user32.dll

        [DllImport("user32.dll", EntryPoint = "HideCaret")]
        public static extern long HideCaret(IntPtr hwnd);

My question is does anyone know if this will work on a 64-bit system?