Have a problem with pausing loop. Can't use thread.sleep and timer control.

Hello,

I am just a beginner programmer, maybe there are some ways to do it, but I couldn't find an aswer in like 3 hours browsing the internet. All I need is to pause the cycle (but not freeze any controls), and then resume it. On a pause it is not supposed to do anything, but it cannot freeze. My program is like that: it does the double mouseclick on a label in a website, which value changes every 1 second, then start a never-ending loop and start getting another value, from a different label. Sounds simple, but the problem is that my program is getting stuck because of that never-ending loop and I need a delay every loop.

Firstly, I cannot use thread.sleep because it gets my webbrowser control frozen. And I cannot use Application.DoEvents(), because i need to pause loops in different places in the same method.

Secondly, I would use a timer, but I can't, because the time, after I execute the code, is not constant and may differ. I just need to do it before processing every loop.

I have also tryed multi-threading, but I'm not sure if I done everything right, so if it would help, please write me some code about it :)

I would appriciate any help. If you know any other methods that would help, please post it.

Here is my code:

public int VardX, VardY, SecX, SecY, SiulX, SiulY, SafeX, SafeY;
public int i = 1;
public IHTMLDocument2 htmlDocument;
public IHTMLSelectionObject currentSelection_sek, currentSelection_vard;
public IHTMLTxtRange range_sek, range_vard;

private void button1_Click(object sender, EventArgs e)
        {
            htmlDocument = webBrowser1.Document.DomDocument as IHTMLDocument2;

            while (i != 0)
            {
                {FIRST 1 SECOND DELAY HERE, AFTER WHICH EXECUTE THE FOLLOWING CODE}

                this.Cursor = new Cursor(Cursor.Current.Handle);
                Cursor.Position = new Point(SecX, SecY);
                mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, SecX, SecY, 0, 0);
                mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, SecX, SecY, 0, 0);
//Double click on the label I need.
                currentSelection_sek = htmlDocument.selection;
                range_sek = currentSelection_sek.createRange() as IHTMLTxtRange;
//Specify the selection
                while ((range_sek.text!=null)&&(range_sek.text.Length > 8)&&(range_sek.text.Length < 22))
//Executes when I get something that i need selected.
                {
                    {ANOTHER 10 MILISECONDS DELAY HERE, AFTER WHICH EXECUTE THE FOLLOWING CODE}
                    if (range_sek.text.Equals(listBox2.Text))
//Checks if the selection already has the value that i need. Must check it every loop.
                         {...Check another value and so on...}