Textbox Scrollbar

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?

Hi Tewl ;) good to see you on ere :p
right i'm guessing that the textbox isnt scrolling down to show the latest data thats been added ( like it normally does in vb6 )
you need to set the textbox's HideSelection property to False, eg:

VB Code:

[COLOR=BLUE]private[/COLOR] [COLOR=BLUE]void[/COLOR] Form1_Load([COLOR=BLUE]object[/COLOR] sender, System.EventArgs e)
{
    textBox1.HideSelection=[COLOR=BLUE]false[/COLOR]; [COLOR=GREEN]/// make the textbox scroll as it should, when it fills up
[/COLOR]}
 
[COLOR=BLUE]private[/COLOR] [COLOR=BLUE]void[/COLOR] AddData([COLOR=BLUE]string[/COLOR] strData)
{
    textBox1.AppendText(strData); [COLOR=GREEN]/// puts the text at the end of the exsisting stuff.
[/COLOR]}

hope it helps you out m8y :)

thx m8 thats just what i needed

Maybe you can answer one more question for me.

When i minimize the app for awhile then restore it later on the textbox seems like it has scrolled down a bit to where i cant see any text thats at the top any ideas y an how i should fix this ;\

sorry for the delay m8, my twin babies have come home, so i'm not gonna be on my pc much now. if you want to show the last line ( eg , scroll to the end ) when the form comes back from minimized, try this...

VB Code:

[COLOR=BLUE]private[/COLOR] [COLOR=BLUE]void[/COLOR] Form1_Resize([COLOR=BLUE]object[/COLOR] sender, System.EventArgs e)
{
    [COLOR=BLUE]if[/COLOR]([COLOR=BLUE]this[/COLOR].WindowState!=FormWindowState.Minimized)
    {
        textBox1.ScrollToCaret();
    }
}

still doin it m8

it also does this when i maximize the form leavin some of the text higher up an a huge chunk of white space at the bottom

nvm itchy told me how to use the sendmessage to do it