C How to use the close button at the top right of the form

This question is simple, I will give you the original **.

namespace windowsapplication2public partial class form1 : formpublic form1()

initializecomponent();

formclosingevent.

private void form1_formclosing(object sender, formclosingeventargs e)

A pop-up prompt box is used for messageboxbuttons. yesnoif ("Confirm closing? ", "Tips", ,== Click Yes to close the form.

false;

else click No, the form is not closed.

true;Here is the formclosing event of the form, and e is the parameter in this method (automatically generated)!

Check out the event! It seems to be a formclosing event.

Then use a messagebox.

Write a tooltip in the closing event of the form. If the user clicks No then cancel the closure.

Click on the form.

Find the formclosing event inside the event.

Then enter these:

dialogresult restlt = "Whether or not to turn it off", "Tips", ,if (restlt ==

false;

true;

form_close()

time to add a messagebox, and depending on the situation returned, make a yes or a cancel

Assassin.

1. First of all, we open the properties of the sub-window, click on the "lightning icon (framed in the picture below)" to find the formclosing (or formclosed) event, and double-click.

2. In the gameui formclosing event**.

<>4、;If you just close the current window, you can't exit the program if it's not the main form, and if you have a managed thread (not the main thread), you can't exit cleanly.

5、;Force all messages to abort and exit all forms, but if there is a managed thread (not the main thread), it will not be able to exit cleanly.

6、;Forcibly aborting all messages on the calling thread also faces the problem that other threads cannot exit correctly.

7、;This is the most thorough way to exit, no matter what thread is forced to quit, and the program ends cleanly.