On Tuesday, 20 August 2019 at 17:17:01 UTC, Vladimirs Nordholm
wrote:
In code I have `import core.sys.windows.winuser;`, but still
get this error.
Importing only specifies that you expect the symbols to be there,
it doesn't mean the functions are linked in.
On Windows there are three targets, 32-bit OMF (old dmd default),
32-bit MSCoff and 64-bit MSCoff (dub defaults to MSCoff since not
too long ago). While DMD ships with import libraries for all
targets, I never know which ones get linked in by default and
which ones don't.
Usually when I get Windows linking errors I either switch the
target (the OMF import libraries are sometimes lacking, so then I
compile with --arch=x86_mscoff or --arch=x86_64) or explicitly
link the import libraries.
Just quickly Google a function like GetSystemMetrics:
https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getsystemmetrics
On the bottom it says "Library: User32.lib" so I add `pragma(lib,
"User32.lib");` to my module using it.
