https://learn.microsoft.com/en-us/windows/win32/api/d2d1/nf-d2d1-id2d1factory-getdesktopdpi?redirectedfrom=MSDN
ID2D1Factory::GetDesktopDpi (d2d1.h) - Win32 apps | Microsoft Learn
Retrieves the current desktop dots per inch (DPI). To refresh this value, call ReloadSystemMetrics.
happsmicrosoftlearn