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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(243.2, 35%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EL3%3C/text%3E%3C/svg%3E)
Hello!
I need help about issue on WinUI Platform. When we set ExtendsContentIntoTitleBar to true in the MainWindow constructor to create custom TitleBar, we have strange behavior: On High Constrast mode, there's no top line in the window.
There are some opened issues in Microsoft's GitHub but we don't have solution yet.
https://github.com/microsoft/microsoft-ui-xaml/issues/8743
https://github.com/microsoft/microsoft-ui-xaml/issues/6901
https://github.com/microsoft/microsoft-ui-xaml/issues/6901
Is there some solution or workaround to solve this case?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(22.400000000000002, 3%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWZ%3C/text%3E%3C/svg%3E)
Could you provide some code snippets about how you set ExtendsContentIntoTitleBar? Using Handler, right? What's the MAUI version?
Hello @Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) ! Thenk you for this interaction.
I mean WinUI3, my mistake informing MAUI.
Best Regards.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 92%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERL%3C/text%3E%3C/svg%3E)
I could reproduce this behavior in the Hight Contrast mode with a blank WinUI3 project which sets ExtendsContentIntoTitleBar as true. It is appreciated to reporting this issue in the WinUI GitHub. That's the right place for reporting such issue that looks like a bug. Please follow the GitHub issue and waiting for PG's response.