Handle wParam in WM_PAINT properly: if non-null, it is the hdc we are
[wine] / dlls / winmm / wavemap / msacm.drv.spec
1 @ stdcall DriverProc(long long long long long) WAVEMAP_DriverProc
2 @ stdcall widMessage(long long long long long) WAVEMAP_widMessage
3 @ stdcall wodMessage(long long long long long) WAVEMAP_wodMessage