https://issues.dlang.org/show_bug.cgi?id=16032

          Issue ID: 16032
           Summary: extern(Windows) missing from core.sys.windows.wingdi
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P1
         Component: druntime
          Assignee: nobody@puremagic.com
          Reporter: johnch_atms@hotmail.com

All of the callback definitions in core.sys.windows.wingdi starting at line 3949 are missing the "extern(Windows)" attribute.

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