Opening .rc-File -> Error RC2104 - WS_EX_COMPOSITED undefined

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Hi!

I had to reinstall Visual Studio 2017 recently.

Now, all of a sudden, when opening the .rc ressource file of a project in the Ressource View, I get the error:

"error RC2104: undefined keyword or key name: WS_EX_COMPOSITED"

The line denoted by the error is:


EXSTYLE WS_EX_COMPOSITED


This applies to *all* projects I have. *All* of them compile without errors, before and after the reinstall. In *all* of them, I could open the .rc file *before* the reinstall.

I tried a new reinstall, but the error remains.

What could have happened? Could this be due to a setting deep in the options which has been reset by the reinstall?

Thanx for your Help!

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