ShouldAppsUseDarkMode is incorrect on Win10 1903+

[henrypp]

fnShouldAppsUseDarkMode // 132

returned inncorrect result on Win10 1903+, you should call:

fnShouldSystemUseDarkMode // 138

ps: also for x64 builds right way for set properties of BOOL (INT) is:

SetPropW(hWnd, L"UseImmersiveDarkModeColors", (HANDLE)(LONG_PTR)dark);

[oltolm]

ShouldAppsUseDarkMode works at least on 22H2 (19045.3324). I tested it myself.

[Chaoses-Ib]

On Windows 11 23H2 (22631.3085), ShouldAppUseDarkMode() always returns true regardless of what system mode and app mode are:

I guess someone in Windows really likes dark mode.

[axoroll7]

Instead of ShouldAppsUseDarkMode, I use :
Registry key : Software\Microsoft\Windows\CurrentVersion\Themes\Personalize\AppsUseLightTheme.
OR Brightness with WinRT (only the Windows 10 SDK is needed, not C++/WinRT) :

#include <iostream>
#include <winrt/Windows.UI.ViewManagement.h>
auto uisettings = winrt::Windows::UI::ViewManagement::UISettings();
auto color = uisettings.GetColorValue(winrt::Windows::UI::ViewManagement::UIColorType::Foreground);
bool isbright = (0.299 * color.R + 0.587 * color.G + 0.114 * color.B) < 127.5;
std::cout << "isbright: " << isbright << std::endl;