Thank you for the speedy reply! That gives me something to Google now.
I was doing some tests this morning and found that the behaviour changed from 15.13 to 15.14. Up to ver 15.13 there was no flicker, after 15.14 it flickers for me.
OK, checking “Enable Runtime Themes” seemed to fix the problem for me. Is this the correct answer? I ask only because I ended up poking things at random until something worked and that is not always the best way to go, lol.
Cheers, Rob C
This reply was modified 4 years, 9 months ago by Robert Crandall.
If manifest is not used then old API used for drawing and some useful features are not available for application. The application works in mode of compatibility with Windows Vista if I’m not wrong. So, I recommend to use a default manifest there. And I will check buttons without manifest, maybe I will find a solution.