You can follow it up here: Entry and Editor: option to disable borders and underline (focus).
how to remove the border in winui3?
![](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(310.4, 2%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EM%3C/text%3E%3C/svg%3E)
mc
6,701
Reputation points
how to remove the border?
Windows development | Windows App SDK
{count} votes
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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(179.20000000000002, 34%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EXY%3C/text%3E%3C/svg%3E)
Xiaopo Yang - MSFT 12,736 Reputation points Microsoft External Staff2023-06-08T01:44:37.7+00:00 Is your application Win32 desktop application or WinUI3? Could you please show a minimal, reproducible sample without private information? Does the BorderlessWindow sample work for you?
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mc 6,701 Reputation points
2023-06-08T09:47:24.4833333+00:00 it is WinUI3 create a project and run it then you will find the border
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mc 6,701 Reputation points
2023-06-08T09:47:41.1+00:00 and I do not want to remove the shadow but the border
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Xiaopo Yang - MSFT 12,736 Reputation points Microsoft External Staff
2023-06-09T05:17:57.9633333+00:00 Try to remove the WS_CAPTION window style of the window.
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mc 6,701 Reputation points
2023-06-09T05:47:29.4733333+00:00 how to remove it?
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Xiaopo Yang - MSFT 12,736 Reputation points Microsoft External Staff
2023-06-09T06:56:04.11+00:00 SetWindowLongPtr with
GWL_STYLE. See WinUI3_Transparent for how to use.
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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(92.8, 23%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESS%3C/text%3E%3C/svg%3E)
S.Sengupta 28,841 Reputation points MVP Volunteer Moderator2023-06-09T05:58:29.47+00:00