Question

when form is loaded myMethod() is called and then it executes some statements. at some point when it gets to if statement it should stop and wait for user to press some button and then it will continue executing according to what user did. i used Thread.Sleep() and ManualResetEvent obj’s WaitOne() method but they seem to freeze the whole process nothing can be done until the time expires. I think that KeyEventHandler in should be run in background so it never feezzed… Anyway how can I do that ?

public partial class Form1 : Form
{
    bool pressed = false;
    public Form1()
    {
        InitializeComponent();
        this.KeyPreview = true;
        this.KeyDown +=new KeyEventHandler(Form1_KeyDown);
    }

    void Form1_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.E)
        {
            pressed = true;
        }
    }

    void myMethod()
    { 
        while (someBool)
        {
            //do something
            if (pressed)
            //do this
            else 
            //do that
        }
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        myMethod();
    }
}

Answer 1

Try starting your method as a Task:

private void Form1_Load(object sender, EventArgs e)
{
    System.Threading.Tasks.Task t = new Task(() => myMethod());
    t.Start();
}

When you test for pressed in your method, set it to false:

void myMethod()
{ 
    while (someBool)
    {
        //do something
        if (pressed)
        {
            pressed = false;
            //do this
        }
        else 
        //do that
    }
}

Of course, this can potentially cause a variety of multithreading errors, depending on what you actually do in myMethod(). I suggest that you look into thread synchronization before you start working with multiple threads.