Bug 15646 – Unresolved symbols when using m32mscoff with Windows subsystem

The example windows application given at http://wiki.dlang.org/D_for_Win32 works fine when compiled with the default OMF runtime, but when compiled with -m32mscoff it gives the following error wintest.obj : error LNK2019: unresolved external symbol _MessageBoxA@16 referenc ed in function _WinMain@16 wintest.exe : fatal error LNK1120: 1 unresolved externals --- errorlevel 1120 It also seems to explicitly require a WinMain function--giving a similar unresolved external symbol error--whereas with the OMF runtime, it seems to function fine with void main() {}

For -m32mscoff or -m64, you need to link against user32.lib explicitly - either add "user32.lib" to the compiler command line, or add pragma(lib, "user32") to your program. I'm not sure why it's necessary only when targeting the MS toolchain, though.

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