Peter

In windows 7 there is the flash only in the basic themes but not in the high contrast themes which I use. It is difficult for me to understand but for me it looks like DWM is causing this. The client area should have been see-through if the background color of the application is not specified, like in xp and before. I got a few skills doing things with a hexeditor and resource editors. Could this be done with a hexeditor or something?

https://answers.microsoft.com/en-us/windows/forum/all/high-contrast-themes-issue/ff386d33-dcfe-4116-8d4a-9c8cd06eb4c0 In the above link it says: Windows 7's classic themes were rendered using GDI graphics rendering (the "Windows 98 graphics engine"). In Windows 8 and higher, the entire desktop is always drawn using the DWM graphics engine. That engine was formerly known as "Aero" in Windows 7 and Vista and back then it was optional, but now it's mandatory. For programs not built for Aero/DWM, it will cause this flash, particularly in "tablet mode" (it's less noticeable or even gone if you turn off tablet mode). Shawn "Cmdr" Keene | Microsoft MVP 2010-2024 | CmdrKeene.com | tweet: @CmdrKeene Microsoft MVPs are independent experts offering real-world answers. Learn more at mvp.microsoft.com. Do you think that DWM has really anything to do with it?

Files will not be overwritten because I never update any windows so that is not a problem. I believe it is possible to remove the windows 10 protection in various ways. But I don't know where the code is that has to be changed. In windows 7 a folder would open using the background color of the current theme but in w10 it always opens with white!

But there must be some place in the code where you can change the default behavior. Where could that place be?

Maybe you can help me with the following. In windows 8, 10, 11 there is a white lightning flash when you open a folder window. It is not there in windows xp and windows 7. You can only see the white flash when darker colors than white are used in the windows theme! When a folder window is opened then windows 10 starts to build the colors of that window, it starts with white! In xp when you open a folder on the desktop it just starts with the color of the background of the desktop. But in w10 it starts with white. Not everybody notices it because a lot of people use the original theme of windows and in that case almost everything is white. The problem is a bit solved when the windows animations are all on but I don't like those irritating animations. Even now when people start using black themes microsoft hasn't done anything to change this. It seems hard coded in the product. Link to a youtube movie made by someone where you can see that it starts building the window with white. https://www.youtube.com/watch?v=uKUA2ycceak Discussion at microsoft. https://answers.microsoft.com/en-us/windows/forum/all/high-contrast-themes-issue/ff386d33-dcfe-4116-8d4a-9c8cd06eb4c0 Could you help me solving this problem?