MMRESULT WINAPI midiOutSetVolume(HMIDIOUT,DWORD);
MMRESULT WINAPI midiOutGetErrorTextA(MMRESULT,LPSTR,UINT);
MMRESULT WINAPI midiOutGetErrorTextW(MMRESULT,LPWSTR,UINT);
-MMRESULT WINAPI midiOutOpen(LPHMIDIOUT,UINT_PTR,DWORD_PTR,DWORD_PTR,DWORD);
+MMRESULT WINAPI midiOutOpen(LPHMIDIOUT,UINT,DWORD_PTR,DWORD_PTR,DWORD);
MMRESULT WINAPI midiOutClose(HMIDIOUT);
MMRESULT WINAPI midiOutPrepareHeader(HMIDIOUT,LPMIDIHDR,UINT);
MMRESULT WINAPI midiOutUnprepareHeader(HMIDIOUT,LPMIDIHDR,UINT);
MMRESULT WINAPI midiInGetDevCapsW(UINT_PTR,LPMIDIINCAPSW,UINT);
MMRESULT WINAPI midiInGetErrorTextA(MMRESULT,LPSTR,UINT);
MMRESULT WINAPI midiInGetErrorTextW(MMRESULT,LPWSTR,UINT);
-MMRESULT WINAPI midiInOpen(LPHMIDIIN,UINT_PTR,DWORD_PTR,DWORD_PTR,DWORD);
+MMRESULT WINAPI midiInOpen(LPHMIDIIN,UINT,DWORD_PTR,DWORD_PTR,DWORD);
MMRESULT WINAPI midiInClose(HMIDIIN);
MMRESULT WINAPI midiInPrepareHeader(HMIDIIN,LPMIDIHDR,UINT);
MMRESULT WINAPI midiInUnprepareHeader(HMIDIIN,LPMIDIHDR,UINT);