How to use multithreading with Winform?

Question

I\'m a newbie with multithreading. I have a winform that have a label and a progress bar.

I wanna show the processing result. Firstly, I use Application.DoEven

Answer 1

Invoke the UI thread. For example:

void SetControlText(Control control, string text)
{
    if (control.InvokeRequired)
        control.Invoke(SetControlText(control, text));
    else
        control.Text = text;
}