The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at C28232.

warning C28232: _Pre_, _Post_, or _Deref_ not applied to any annotation

This warning indicates that a _Pre_, _Post_, or _Deref_ operator appears in an annotation expression without a subsequent functional annotation; the modifier was ignored, but this indicates an incorrectly coded annotation.