I am adding data to a multiline text box when data is arrived from a socket where the new text is on the bottom, I kno I can use

textbox.text += newtext;
textbox.SelectionStart = textbox.text.length;

but the textbox has to have focus plus it makes the screen flicker when it does it, both I do have

someone told me to use api's to lock the scrollbar but I haven't used api's that much

does anyone kno what api i need to use to do this an how do i use it?