193 MMRESULT WINMM_CheckCallback(DWORD_PTR dwCallback, DWORD fdwOpen, BOOL mixer)  in WINMM_CheckCallback()  argument
199         if (dwCallback && !IsWindow((HWND)dwCallback))  in WINMM_CheckCallback()
339 UINT WINAPI mixerOpen(LPHMIXER lphMix, UINT uDeviceID, DWORD_PTR dwCallback,  in mixerOpen()  argument
348 	  lphMix, uDeviceID, dwCallback, dwInstance, fdwOpen);  in mixerOpen()
350     dwRet = WINMM_CheckCallback(dwCallback, fdwOpen, TRUE);  in mixerOpen()
354     mod.dwCallback = (DWORD_PTR)MIXER_WCallback;  in mixerOpen()
356         mod.dwInstance = dwCallback;  in mixerOpen()
367 		       &dwCallback, &dwInstance);  in mixerOpen()
926 	lpwm->mod.dwCallback = *lpdwCallback;  in MIDI_OutAlloc()
940                        DWORD_PTR dwCallback, DWORD_PTR dwInstance, DWORD dwFlags)  in midiOutOpen()  argument
947 	  lphMidiOut, uDeviceID, dwCallback, dwInstance, dwFlags);  in midiOutOpen()
951     dwRet = WINMM_CheckCallback(dwCallback, dwFlags, FALSE);  in midiOutOpen()
955     lpwm = MIDI_OutAlloc(&hMidiOut, &dwCallback, &dwInstance, &dwFlags, 0, NULL);  in midiOutOpen()
1235 		       DWORD_PTR dwCallback, DWORD_PTR dwInstance, DWORD dwFlags)  in midiInOpen()  argument
1242 	  lphMidiIn, uDeviceID, dwCallback, dwInstance, dwFlags);  in midiInOpen()
1246     dwRet = WINMM_CheckCallback(dwCallback, dwFlags, FALSE);  in midiInOpen()
1251 				    &dwFlags, &dwCallback, &dwInstance);  in midiInOpen()
1257     lpwm->mod.dwCallback = dwCallback;  in midiInOpen()
1532 	    DriverCallback(lpwm->mod.dwCallback, lpMidiStrm->wFlags,  in MMSYSTEM_MidiStream_MessageHandler()
1607 	    DriverCallback(lpwm->mod.dwCallback, lpMidiStrm->wFlags,  in MMSYSTEM_MidiStream_MessageHandler()
1729 	    DriverCallback(lpwm->mod.dwCallback, lpMidiStrm->wFlags,  in MMSYSTEM_MidiStream_Player()
1742 	    DriverCallback(lpwm->mod.dwCallback, lpMidiStrm->wFlags,  in MMSYSTEM_MidiStream_Player()
1796 			       DWORD cMidi, DWORD_PTR dwCallback,  in midiStreamOpen()  argument
1806 	  lphMidiStrm, lpuDeviceID, cMidi, dwCallback, dwInstance, fdwOpen);  in midiStreamOpen()
1811     ret = WINMM_CheckCallback(dwCallback, fdwOpen, FALSE);  in midiStreamOpen()
1826     lpwm = MIDI_OutAlloc(&hMidiOut, &dwCallback, &dwInstance, &fdwOpen, 1, &mosm);  in midiStreamOpen()
2053                       LPCWAVEFORMATEX lpFormat, DWORD_PTR dwCallback,  in WAVE_Open()  argument
2062 	  lphndl, (int)uDeviceID, (uType==MMDRV_WAVEOUT)?"Out":"In", lpFormat, dwCallback,  in WAVE_Open()
2068     dwRet = WINMM_CheckCallback(dwCallback, dwFlags, FALSE);  in WAVE_Open()
2088 			    &dwFlags, &dwCallback, &dwInstance)) == NULL) {  in WAVE_Open()
2094     wod.dwCallback = dwCallback;  in WAVE_Open()
2098     TRACE("cb=%08lx\n", wod.dwCallback);  in WAVE_Open()
2247                        LPCWAVEFORMATEX lpFormat, DWORD_PTR dwCallback,  in waveOutOpen()  argument
2251                      dwCallback, dwInstance, dwFlags);  in waveOutOpen()
2624                            LPCWAVEFORMATEX lpFormat, DWORD_PTR dwCallback,  in waveInOpen()  argument
2628                      dwCallback, dwInstance, dwFlags);  in waveInOpen()