Apparently I previously had one of the source files wrong here...
Update this to reflect the correct file.
My fault for not seeing this earlier-sorry. DOH.
<File RelativePath="..\..\..\gdk\win32\gdkselection-win32.c" />\r
<File RelativePath="..\..\..\gdk\win32\gdktestutils-win32.c" />\r
<File RelativePath="..\..\..\gdk\win32\gdkvisual-win32.c" />\r
- <File RelativePath="..\..\..\gdk\win32\gdkwin32displaymanager.c" />\r
+ <File RelativePath="..\..\..\gdk\win32\gdkdisplaymanager-win32.c" />\r
<File RelativePath="..\..\..\gdk\win32\gdkwin32id.c" />\r
<File RelativePath="..\..\..\gdk\win32\gdkwindow-win32.c" />\r
</Filter>\r