>I am currently correcting lowere case characters with TO Upper on RETURN key
>
>My client wants it converted as it goes in
>
>Some code I tried UPPERS the previous input which is OK but then adds the new input at the beinning!!!
>
>R

did you try this code

private void textBox1_TextChanged(object sender, EventArgs e)
{
  ((TextBox)sender).Text = ((TextBox)sender).Text.ToUpper();
  ((TextBox)sender).SelectionStart = ((TextBox)sender).Text.Length;
}

the 2nd line (((TextBox)sender).SelectionStart = ((TextBox)sender).Text.Length;)moves the cursor to the end.