FONTENUMPROCW missing definition

[timsneath]

There's a class of these cases, but this is a good example:

// Windows.Win32.Gdi.FONTENUMPROCW
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Auto, CharSet = CharSet.Auto)]
[UnmanagedFunctionPointer(CallingConvention.Winapi)]
public delegate int FONTENUMPROCW();

The header files are a fairly convoluted set of #ifdef statements, but it should be defined as something like this:

typedef int (CALLBACK* OLDFONTENUMPROCW)(CONST LOGFONTW *, CONST TEXTMETRICW *, DWORD, LPARAM);

It's worth noting that the documentation is marked as obsolete, when it remains the best source of this content:
https://docs.microsoft.com/en-us/previous-versions/dd162621(v=vs.85)