Developer technologies | Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
Window shown in alt tab menu even included tool window style
![](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(281.6, 45%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EP%3C/text%3E%3C/svg%3E)
phongla
0
Reputation points
I am working with wpf application that create a transparent, topmost window. I also set tool window style for my window by using: SetWindowLong(hwnd, GWL_EXSTYLE, extendedStyle | WS_EX_TOOLWINDOW). It is ok during application running but when I go to Task Manager (Details tab) and "End task" the explorer.exe then start it again by clicking run new task, my application's windows will be shown in alt tab area even it still include ToolWindow style normally (I checked by Spy++).
One more important note that I cannot reproduce that issue if run application directly but if I use a service to start the application with UI access token (SetTokenInformation(hUserToken, TOKEN_INFORMATION_CLASS.TokenUIAccess, ref dwUIAccess, sizeof(uint))) . I can reproduce the issue. Can anyone help me to explain the reason?
Developer technologies | Windows Presentation Foundation
Developer technologies | C#
Developer technologies | C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
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Viorel 126.1K Reputation points2024-11-15T06:57:41.3833333+00:00 Did you also try to change the ShowInTaskbar property of the window?
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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(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Anonymous2024-11-22T01:03:33.5866667+00:00 Hi,@phongla.
Did you solve your problem? If you found a solution, you could share it here to help others in the community who have similar problems. If you still have problems, you could describe your problem in more detail and I will further analyze and answer it for you.
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