Functioning of Enter, Escape and Backspace Keys in Textbox

Sir, I am now doing a Program that has numbers of text boxes , combo Boxes and datetimePickers.

I needed the code to:-

Function: Enter, Back Space and Escape Keys.

I got the Code to function Enter Key:-

(if(e.key code==keys.Enter)
{
textBox2.Focus)
}



but what i need is when I press Enter Key from text Box1, i want to cursor to be in the starting Point to the textBox2  if text Box is !=null


when I press Back Space Key, i want to return to the Starting Point previous text Box if text Box!=null

if all text Box is ==string.Empty, I want the rounding of cursor throughout all the text Box when press Back Space Key.


Please help me.