Or do I have to use threads? (C++)
Displays a message window, also known as a dialog box, which presents a message to the user. It is a modal window, blocking other actions in the application until the user closes it. A MessageBox can contain text, buttons, and symbols that inform and instruct the user.
A message box is a prefabricated modal dialog box that displays a text message to a user. You show a message box by calling the static Show method of the MessageBox class. The text message that is displayed is the string argument that you pass to Show.
Provides various button combination like Ok, OkCancel, YesNo, YesNoCancel, RetryCancel and much more. By default, it shows only Ok button.
No there isn't. Alternatively, you can create a "modeless dialog box".
Message boxes are modal dialogs. The whole idea is that they aren't asynchronous. Assuming it was possible to do this (which it is, given the right amount of tinkering), would you want to confuse users with something that looks familiar but acts in a different way to what they expect? The question is, why do you want to do this? maybe there is a better solution.
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