Is there a fast way to turn MessageBox into non modal dialog?

Question

I want to show multiple windows at once.

for(int i=0; i < 5; i++)
  {
    Sleep(10);
    MessageBox(NULL, "Some information", NULL, MB_OK);
  }

It's showing them one after another, but I want to show them all at one time

(Sorry for my English)

Thanks!

Related if not a duplicate: https://stackoverflow.com/questions/3556089/is-there-any-way-to-have-async-messagebox — drescherjm, Aug 02 '19 at 20:16
`MessageBox(NULL, "Some information", NULL, MB_OK | MB_TASKMODAL);` — Tony J, Aug 02 '19 at 20:18
You can create multiple threads (not recommended), are you creating a joke/virus app? — Michael Chourdakis, Aug 02 '19 at 20:20
This may help with the threads: https://stackoverflow.com/questions/8617450/how-do-you-create-a-message-box-thread — drescherjm, Aug 02 '19 at 20:37
Multi threads are working with `MessageBoxA(NULL, "Some text", NULL, MB_ICONERROR);` but not with `MessageBoxA(NULL, "Some text", NULL, MB_ICONERROR | MB_TOPMOST);` .Is it possible to fix that? — dawidsk12345, Aug 03 '19 at 10:31
Straight from the [documentation](https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messagebox): *"Displays a modal dialog box that contains a system icon, a set of buttons, and a brief application-specific message, such as status or error information. **The message box returns an integer value that indicates which button the user clicked.**"* — IInspectable, Aug 03 '19 at 14:46

score 4 · Accepted Answer · answered Aug 02 '19 at 21:37

MessageBox is a modal dialog, the function does not return until the dialog has been closed. Multiple MessageBoxs can only be created if you have multiple threads in your process. MessageBox is a special version of DialogBox.

You can use CreateDialog to create modeless dialogs but you should not show many dialogs to the user at the same time. I would recommend that you create a single dialog with a ListView if you need to display many "events" to the user at the same time.

Is there a fast way to turn MessageBox into non modal dialog?

1 Answers1