As far as my testing goes, the message box is never shown on Windows when abort() is called with retail runtime is used, regardless of error mode and abort behaviour. That is not the case with _assert which still can show a dialog even in release mode.
It happens rather often that an app meets the error condition during the process exit and that goes silent on Windows while we display the abort dialog on app's exit.
The test program below shows that (and the same behaviour is, e. g., with ucrtbase vs ucrtbased).
```
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
void CDECL _set_app_type(int app_type);
#define D(name) static typeof(name) *p_##name
#define L(name) p_##name = (void *)GetProcAddress(hdll, #name); if (!p_##name) printf("NULL %s.\n", #name)
D(abort);
D(_set_app_type);
D(_set_abort_behavior);
D(_set_error_mode);
int main(int argc, char *argv[])
{
HMODULE hdll = LoadLibraryA("msvcrt.dll");
printf("hdll %p.\n", hdll);
L(_set_app_type);
if (!p__set_app_type)
if (!(p__set_app_type = (void *)GetProcAddress(hdll, "__set_app_type")))
printf("NULL p__set_app_type.\n");
L(abort);
L(_set_abort_behavior);
L(_set_error_mode);
p__set_app_type(2);
if (p__set_abort_behavior)
p__set_abort_behavior(_WRITE_ABORT_MSG, _WRITE_ABORT_MSG);
p__set_error_mode(_OUT_TO_MSGBOX);
p_abort();
}
```
--
v2: msvcrt: Display message box in abort() for specific CRT versions only.
https://gitlab.winehq.org/wine/wine/-/merge_requests/1128
With this series it's now possible to run and pass `user32:monitor` and `user32:sysparams` tests with nulldrv, and so most `user32` tests (except for a few desktop cursor position tests). This still requires some prefix configuration to enable the nulldrv driver, or a change like https://gitlab.winehq.org/rbernon/wine/-/commit/753368ad0ec52f03f8d6e78ca79… to enable it when `DISPLAY` environment variable is unset.
This then shows that some of the user32 tests are failing with winex11 but passing with nulldrv, as in https://gitlab.winehq.org/rbernon/wine/-/commit/6d5f4109a514a0dc266899fcacf….
--
v11: win32u: Read mode from the registry if GetCurrentDisplaySettings fails.
win32u: Write display settings to the registry in apply_display_settings.
win32u: Lock display devices while applying display settings.
winemac.drv: Avoid calling back to win32u to find the primary adapter.
winex11.drv: Avoid calling back to win32u to find the primary adapter.
win32u: Add an is_primary parameter to ChangeDisplaySettings.
win32u: Force update display cache after NtUserChangeDisplaySettingsEx.
win32u: Add a BOOL force parameter to update_display_cache.
https://gitlab.winehq.org/wine/wine/-/merge_requests/551