Windows multimedia functions (functions in winmm. dll)

Function	Introduction
Auxgetdevcaps	Queries a specified secondary output device to determine its performance
Auxgetnumdevs	Check the number of auxiliary output devices in the system.
Auxgetvolume	Returns the current volume device of the specified secondary output device.
Auxoutmessage	Sends a message to the specified secondary output device.
Auxsetvolume	Set the volume in the specified secondary output device
Closedirver	Disable the specified installable drive
Defdriverproc	Default processing for messages that cannot be processed by the installation drive
Drivercallback	Call a callback function to send a message to the window or remove the blocking of a thread.
Drvgetmodulehandle	Returns an instance handle containing the specified driver module that can be installed.
Drvsendmessage	Sends the specified message to the installable drive.
Getdrivermodulehandle	Returns an instance handle containing the specified driver module that can be installed.
Joygetdevcaps	Queries a specified gamer device to determine its performance
Joygetnumdevs	Returns the number of players supported by the system.
Joygetpos	Queries the location and activity of a specified gamer device.
Joygetposex	Queries the location of a gamer's Device and Its button status.
Joygetthreshold	Queries the current moving threshold of a specified gamer's device.
Joyreleasecapture	Releases the capture on a specified player lever device set by the joysetcapture function.
Joysetcapture	Send a gamer message to the specified window
Joysetthreshold	Sets the threshold for moving a specified gamer device.
Mcigetcreatortask	Checks the task created for the specified MCI device.
Mcigetdeviceid	Returns the identifier of the device that matches the enabled device name.
Mcigeterrorstring	Returns the string that describes the error code of the specified media control interface.
Mcigetyieldproc	Returns the address of the callback function associated with the wait flag of the media control interface.
Mcisendcommand	Sends a command to the specified media control interface device.
Mcisendstring	Sends a string to the specified media control interface device.
Mcisetyieldproc	Set a process address. When the MCI device waits for a command to complete because of the wait flag, the process is periodically called.
Midiconnect	Connects the specified MIDI input device to the output device.
Mididisconnect	Disconnect the MIDI input device from the output device
Midiinaddbuffer	Adds a buffer to the input device of the specified music Instrument Digital Interface.
Midiinclose	Disable the input device of the specified music Instrument Digital Interface
Midiingetdvecaps	Queries the input device of the specified music instrument digital interface to determine its performance
Midiingeterrortext	Retrieve text descriptions of input device errors related to the digital interface of Music Instruments
Midiingetid	Obtains the identifier of the input device for a music digital interface.
Midiingetnumdevs	Check the number of input devices for the digital interface of the music instrument in the system
Midiinmessage	Sends a message to the input device drive of the specified music Instrument Digital Interface
Midiinopen	Enable the input device of the specified music Instrument Digital Interface
Midiinprepareheader	Prepare a buffer for the input device of the music Instrument Digital Interface
Midiinreset	Input on the given MIDI input device and mark all pending input buffers as executed
Midiinstart	Start input on the input device of the specified music Instrument Digital Interface
Midiinstop	Stop input on the input device of the given music Instrument Digital Interface
Midiinunprepareheader	Eliminate preparations completed by the midiinprepareheader Function
Midioutcachedrumpatches	Request an internal MIDI synthesis device to pre-install the specified key-based hitting tone set
Midioutcachepatches	Request the synthesis device of the internal music instrument digital interface to pre-install the specified tone set
Midioutclose	Disable the output device of the specified music Instrument Digital Interface
Midioutgetdevcaps	Queries the output device of the specified music instrument digital interface to determine its performance
Midioutgeterrortext	Obtains the text description specified by the Midi output device.
Midioutgetid	Obtains the identifier of the specified MIDI output device.
Midioutgetnumdevs	Check the number of MIDI output devices in the system.
Midioutgetvolume	Returns the current volume settings of a MIDI output device.
Midioutlongmsg	Sends a system-specific MIDI message to a specified MIDI output device.
Midioutmessage	Sends a message to a MIDI output device drive.
Midioutopen	Enable the specified MIDI output device for playback
Midioutprepareheader	Prepare a buffer for the Midi output device
Midioutreset	Disable all logos on all MIDI channels for the specified MIDI output device
Midioutsetvolume	Sets the volume of a MIDI output device.
Midioutshortmsg	Sends a short MIDI message to the specified MIDI output device.
Midioutunprepareheader	Clear preparations completed by the midioutprepareheader Function
Midistreamclose	Close an open MIDI stream
Midistreamopen	For the output, open a MIDI stream
Midistreamout	Play or queue a MIDI data stream on the Midi output device
Midistreampause	Pause playing a MIDI stream
Midistreamposition	Check the current position in a MIDI stream
Midistreamproperty	Set or retrieve the characteristics of the Midi data stream related to the Midi output device
Midistreamrestart	Restart a paused MIDI stream
Midistreamstop	Disable all MIDI channels of the specified MIDI output device
Mixerclose	Disable the specified Mixer
Mixergetcontroldetails	Check the details of a single control related to a voice frequency line
Mixergetdevcaps	Query the specified mixer to determine its performance
Mixergetid	Obtains the identifier of a specified mixer.
Mixergetlinecontrils	Checks one or more controls related to an audio frequency line.
Mixergetlineinfo	Obtains information about the specific line of the mixer.
Mixergetnumdevs	Returns the number of mixers in the system.
Mixermessage	Send a message of a custom mixer driver directly to the mixer driver.
Mixeropen	Open the specified mixer and ensure that the device is not removed before the application closes the handle.
Mixersetcontroldetails	Set the details of a single control related to a voice frequency line
Mmioasvance	Fill in the IO buffer of a file
Mmioascend	Retrieve a riff file Block
Mmioclose	Close files opened with mmioopen
Mmiocreatechunk	Creates a block in the riff file opened by the mmioopen function.
Mmiodescend	Enter the riff file block opened by the mmioopen function, and find a block
Mmioflush	Write Data in the file buffer to the disk.
Mmiogetinfo	Retrieve Information about Riff files created by the mmioopen Function
Mmioinstallioproca	Load or delete a custom Io Process
Mmioopen	Open a file for Input and Output
Mmioread	Reads data of a specified number of bytes from a file opened by the mmioopen function.
Mmiorename	Rename the specified file
Mmioseek	Change the current pointer position in the file opened by the mmioopen Function
Mmiosendmessage	Sends a message to the IO process associated with the specified file.
Mmiosetbuffer	Allow or disable file Buffer I/O, change the buffer, or change the buffer size
Mmiosetinfo	Update the information retrieved from the opened file
Mmiostringtofourcc	Converts a null string into a 4-character code.
Mmiowrite	Write the specified number of bytes to the file opened by the mmioopen function.
Mmsystemgetversion	Returns the current version number of the multimedia extended system software.
Opendriver	Open an installable drive instance and use the default setting or specified value to initialize the instance.
Playsound	Play a waveform sound
Senddrivemessage	Sends a message to the specified installable drive.
Sndplaysound	Play a waveform sound specified by the file name or the entry of the registered [sound] segment
Timebeginperiod	Sets the minimum timer resolution used by the application or driver.
Timeendperiod	Clears the minimum timer resolution used by the application or driver.
Timegetdevcaps	Query the timer device to determine its performance
Timegetsystemtime	Checks the number of milliseconds that have elapsed since Windows.
Timegettime	Checks the number of milliseconds that have elapsed since Windows. This function has less overhead than the previous function.
Timekillevent	Destroys the specified timer callback event.
Timesetevent	Set a timer callback event
Waveinaddbuffer	Add an input buffer to the waveform Input Device
Waveinclose	Disable the specified waveform input settings
Waveingetdevcaps	Query the specified waveform input device to determine its performance
Waveingeterrortext	Checks the text description identified by the specified error code.
Waveingetid	Obtains the identifier of the specified waveform input device.
Waveingetnumdevs	Returns the number of waveform input devices in the system.
Waveingetposition	Returns the current location of the specified waveform input device.
Waveinmessage	Send a message to the drive of the waveform Input Device
Waveinopen	Open a waveform input device for recording
Waveinprepareheader	Prepare an input buffer for Waveform Input
Waveinreset	Stop input of the specified waveform input device and clear the current position
Waveinstart	Start input on the specified waveform Input Device
Waveinstop	Stop input on the specified waveform Input Device
Waveinunprepareheader	Preparation for clearing the implementation by the waveinprepareheader Function
Waveoutbreakloop	Interrupt a loop on a given waveform output device and allow the playing of the next block in the drive list
Waveoutclose	Disable the specified waveform output device
Waveoutgetdevcaps	Queries a specified waveform output device to determine its performance
Waveoutgeterrortext	Checks the text description identified by the specified error code.
Waveoutgetid	Obtains the identifier of the specified waveform output device.
Waveoutgetnumdevs	Check the number of waveform output devices in the system
Waveoutgetpitch	Queries the current tone settings of a waveform output device.
Waveoutgetplaybackrate	Queries the current playback speed of a waveform output device.
Waveoutgetposition	Checks the current playback position of the specified waveform output device.
Waveoutgetvolume	Queries the current volume settings of the specified waveform output device.
Waveoutmessage	Send a message to the drive of a waveform output device.
Waveoutopen	Enable a waveform output device for playback
Waveoutpause	Pause playing on the specified waveform output device
Waveoutprepareheader	Prepare a waveform buffer for playback
Waveoutrestart	Restart a paused waveform output device
Waveoutsetpitch	Set the tone of a waveform output device
Waveoutsetplaybackrate	Set the speed of the specified waveform output device
Waveoutsetvolume	Sets the volume of the specified waveform output device.
Waveoutunprepareheader	Preparation for clearing the implementation by the waveoutprepareheader Function
Waveoutwrite	Sends a data block to the specified waveform output device.