#include <windows.h>
MessageBoxW(
NULL,
(LPCWSTR)L"This will be the text",
(LPCWSTR)L"This will be the title",
MB_ICONERROR | MB_YESNO
/*
Instructions about how to configure the icon's
and buttons can be found at:
https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messageboxw
*/
);