Redraw titlebar after setting dark mode in Windows

Asked Dec 03 '22 at 13:27

Active Dec 03 '22 at 20:24

Viewed 260 times

I am using the following library call to change the window to dark mode:

BOOL dark = TRUE;
DwmSetWindowAttribute(hwnd, DWMWA_USE_IMMERSIVE_DARK_MODE, &dark, sizeof(dark));

This works, with a small caveat. The title bar doesn't update until some additional event happens, like maximizing, losing focus, resizing, etc. (but not moving the window).

I have tried UpdateWindow and a huge number of combinations of flags on RedrawWindow with no luck. How can I force the title bar to redraw?

Edit I was able to force the reset by programmatically resizing the window, then resetting it to the previous size. But that seems like a terrible method. There must be a proper solution.

edited Dec 03 '22 at 16:51

IInspectable

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asked Dec 03 '22 at 13:27

steveo225

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does this helps? [invalidating-non-client-areas](https://stackoverflow.com/questions/2819937/invalidating-non-client-areas) – apple apple Dec 03 '22 at 13:50
Unfortunately no – steveo225 Dec 03 '22 at 13:58
Did you try the answer that's not accepted, i.e. calling [`SetWindowPos`](https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-setwindowpos)? – IInspectable Dec 03 '22 at 16:49
Yes, that didn;t work either – steveo225 Dec 03 '22 at 16:51
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The only way we've found to do this is by using an undocumented API. Unfortunately Microsoft have not properly finished or documented their Dark Mode API. – Jonathan Potter Dec 03 '22 at 20:56
@JonathanPotter can you please point out which undocumented API did you use to achieve this? I am facing a similar issue and haven't found a solution yet. – Ricky Spanish May 01 '23 at 12:10

Redraw titlebar after setting dark mode in Windows

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