I've added skinning to our application to try it out. I have loaded the Windows10 theme and tried White and Black. But I find some dialogs simply don't display correctly. Controls that don't show up until I move the cursor over them is the problem I am looking at now.

Dialog "X" (close) icons that are slightly too big or in some cases too small (a tiny little "x").

My app is running on a desktop that has a 4k monitor scaled to 200%. My other monitors are "normal" and the DPI is 100% for them. My DPIAwarenessContext is set to "system aware".

I even have a dialog that doesn't show up if I have moved my app to my 4k monitor and bring it up. I found the dialog via control-alt-spacebar then hit an arrow key and move the mouse. It pops up on my non-4k monitor but it is HUGE.

I have also seen message boxes show up on my 4k monitor that are tiny when my app is on the non-4k monitor. When skinning isn't enabled, I see none of these problems. I have a UI that lets me enable and disable skinning at will. The problems go away if I disable, and show up if I enable them.

Well even with per monitor aware I have issues. I had to move over the items in the "Properties" group to even see them. Note how the background is missing. The controls at the button "Ok" ... only displayed when I clicked alt to do an alt-printscreen.

Well my image didn't show up. I guess copy&paste shows up in the post window but not when I post. Try again.