set focus to a textBox in uwp [duplicate]

Question

I have a Universal Windows Platform project that has a textBox element.
I'd like to set the focus to it when a Radio Button is clicked.

In the Radio Button click event, I can say:

txtBoxID.IsEnabled = true;
txtBoxID.Text = "";

But how do I set the focus? I saw some answers saying to use:

FocusManager.SetFocusedElement(

but my FocusManager class doesn't have that method.

edit: Solved, thanks. Just needed to know what argument to pass to SetFocus. The other fellow's question which was thought to be similar was regarding an event occurring after he set focus to his control.

Answer 1

All the code you need is:

txtBoxID.Focus(FocusState.Programmatic);

Method is defined in Control.