Hi dbrookes,

I would have posted this sooner but our IT guys blocked this website due to a certificate issue (out of date if I recall):

Are you guys using `DwmSetWindowAttribute` to enable Windows 11 rounded corners?

If so I had a issue where enabling on our main window caused a very similar looking bleed when maximized.

We ended up updating the corner preference to "do not round" when the window was "zoomed" (maximized). We just update than on `WM_SIZE` depending on the flag (SIZE_MAXIMIZED or SIZE_RESTORED).

Also make sure to disable the XTP command bars frame hook shadows if using Windows 11 rounded corners. They'll do the shadow for you and XTP shadows interfere with that.

So the image posted looks nothing like the preview as the post is scaled way down making it difficult to see the bleeding frame of our app. So here it is in a zip file.

Here's an image of my entire desktop. Three monitors and our app is maximized on the middle monitor. I drew rectangles around the display that spills onto the left and right monitors. My monitors are quite large so the image is too. The left monitor isn't as tall as the other two so the white at the bottom of that part of the image is just part of the virtual desktop.

So I hope this one shows up as the post appeared with no image. I don't even see the zip of the mp4. Perhaps they show up later.

We have an issue with our CJ 24.2 (and earlier) based frame windows. When the frame theme is enabled and we maximize the window, the frame bleeds over into an adjacent monitor. To see this run the Codejock Ribbon Sample. Put it on a monitor to the left of the main monitor and maximize it.

Part of the frame display appears on the adjacent monitor. If I move the app to the monitor to the right of my main monitor, I don't always see the display issue. But as I maximize and unmaximize the frame I can see part of the left edge of the frame flash on the main (middle monitor).

Print screen, Snip and other tools I try to use to capture the display don't grab it. So I used my iPhone to do so. In the image scroll right until you get to the edges of the two monitors and you can see a light line appearing on the right monitor. I also attached a zip file of an mp4 I captured showing the flashing of part of the frame when I am maximizing and restoring the ribbon sample app. Its only about 5s long and at about 2.5s you will see a flashing display. I'm currently stepping thru the display code to see what causes it. I thought at first it was the shadow but I set a break point where the shadow is created when setting the frame theme and skipped the call to create it. I also verified GetShadow returns null. I also eliminated scaled desktops (DPI > 96) as this shows up whether the desktop is scaled or not.