C#

this.Enabled = false;

Saksida Bojan wrote:

Moddaly and non moddaly means only that it runs either in diffrent or same thread

public partial class Form1 : Form {
    int count;

    public Form1() {
        InitializeComponent();
    }

    public void log(string s) {
        lb.Items.Add(s);
    }

    private void button1_Click(object sender, EventArgs e) {
        log("Thread ID="+Thread.CurrentThread.ManagedThreadId);
        Form2 f=new Form2();
        f.ShowDialog();
    }

    protected override void WndProc(ref Message m) {
        count++;
        if (count<5) log("Thread ID="+Thread.CurrentThread.ManagedThreadId);
        base.WndProc(ref m);
    }
}