Small Extended Window Style without Titlebar

Question

Small Extended Window Style without Titlebar

tscholl89 1

I need the following properties on my WPF Window:

[Extended Window Style][1] (because i need the WS_EX_NOACTIVATE attribute)
Completely hide the Minimize, Maximize, Close buttons
Allowing the window to be as small as about 10 units
the Window can not have Windowstyle=None

Setting the Window as a Toolwindow will not allow me to completely hide the close button, (using ~WS_SYSMENU has not effect), but would allow me to set narrow Window Setting the Window as a Singleborderwindow allows me to completely hide titlebar buttons (using ~WS_SYSMENU), but will not allow me to set the window size smaller as 100 units [1]: https://learn.microsoft.com/en-us/windows/win32/winmsg/extended-window-styles

Viorel 122.6K Reputation points

2021-03-14T19:46:46.717+00:00

It seems to work if you set WindowStyle="None", ResizeMode="NoResize" (if it should not be resizeable), ShowInTaskbar="False", Topmost="True", Height="10", and also handle the Loaded event and add the WS_EX_NOACTIVATE style using GetWindowLongPtr and SetWindowLongPtr Windows functions. If it is not the only (main) window, then show it using a separate Thread.

The window does not have any system button, has a small height; the WS_EX_NOACTIVATE style works as expected.

Your answer

Viorel 122.6K Reputation points

2021-03-14T19:46:46.717+00:00

It seems to work if you set WindowStyle="None", ResizeMode="NoResize" (if it should not be resizeable), ShowInTaskbar="False", Topmost="True", Height="10", and also handle the Loaded event and add the WS_EX_NOACTIVATE style using GetWindowLongPtr and SetWindowLongPtr Windows functions. If it is not the only (main) window, then show it using a separate Thread.

The window does not have any system button, has a small height; the WS_EX_NOACTIVATE style works as expected.

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Small Extended Window Style without Titlebar

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