Most of them come from logging that is compiled out. The disabled DIAG_LOGF /
FANY_IPC_LOG* macros expanded to `((void)0)`, so every HRESULT and parameter
that exists only to be logged looked unreferenced (C4189/C4100). They now
expand to `((void)sizeof(DiscardLogArgs(__VA_ARGS__)))`: the arguments stay in
an unevaluated context, so nothing is computed and no side effect runs, but the
names count as used.
The rest:
- C4100: commented out the parameter names that are genuinely unused
(WinMain's hPrevInstance/nCmdShow, AdjustWndPosition's hwnd/height, the
WebView2 callbacks' sender, and the no-op logging sinks).
- C4189/C4101: removed the dead locals and the unused catch bindings left over
with the log statements.
- C4244: made the DIP-to-pixel and int-to-float conversions explicit in
globals.h, ime_windows.cpp and the menu placement.
- C4456: renamed the shadowing `hwnd` and `lock` locals.
- C4005: guarded the tests' `#define NOMINMAX` with #ifndef; the test targets
already define it on the command line.
Release builds clean and ctest passes for the server, the tests and msimeui.
Warnings under vendor/ are untouched: those are submodules with their own
repositories.
fanlusky