Visual Studio: Shortcut to close window not working

In Visual Studio (VS 2015 in my case but it's similar down to VS 2010 at least) keyboard shortcuts may have a different meaning depending on the context in which they are executed.

Click Tools / Options / Environment / Keyboard to look up or define shortcuts (you already did that probably). What I called "context" is selected in the combobox labelled "Use new shortcut in:". Most likely you defined the shortcut in "Global" but you want it to work in "Text Editor". In the latter Ctrl+W selects the current word.

Redefine Ctrl+W for "Text Editor" and you should be fine.

In Visual Studio 2019 it is Ctrl-F4 by default to CloseDocumentWindow. The action is Window.CloseDocumentWindow. I know this is old but the accepted answer has you change the short-cut key instead. I would rather use the default option.

Tools -> Options -> Environment -> Keyboard

If you're ever unsure go to the path above and you will see the image above then you can click inside the box "Press shortcut key" at the bottom of the form and type the short cut key you're interested in and it will tell you if it is used and what it is currently used for.

You can also reference the docs

https://docs.microsoft.com/en-us/visualstudio/ide/default-keyboard-shortcuts-in-visual-studio?view=vs-2019

I am using Visual Studio 2017 & Visual Studio 2019 and tried the answer from @TobiMcNamobi but it didn't work for me. After few such tries I got it work with below steps.

You should add it as Global shourtcut otherwise it will not work for Designer views.

1. Add CTRL+W as a Global shortcut for Window.CloseDocumentWindow
2. Remove the CTRL+W shortcut for Edit.SelectCurrentWord