How can I make multiple forms be closed using 1 hotkey using c#?

Question

I want multiple forms to be closed when 1 hotkey is pressed, but I don't know how. I was thinking of using 1 form to close all of the forms, but I don't know how to do that.

Answer 1

Hi, welcome to Microsoft Q&A.

You can use the PreviewKeyDown event to make the form get a hotkey and perform the corresponding operation.

The following code implements the function of pressing the Esc key to close all forms.

        private void Form2_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
        {
            if (e.KeyCode == Keys.Escape)
            {
                List<Form> formsToClose = new List<Form>(Application.OpenForms.Cast<Form>());
                foreach (Form form in formsToClose)
                {
                    form.Close();
                }
            }
        }

Best Regards.

Jiachen Li

---

If the answer is helpful, please click "Accept Answer" and upvote it.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.