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PlaySound
The PlaySound function plays a sound specified by the given filename, resource, or system
event. (A system event may be associated with a sound in the registry or in the
WIN.INI file.)
BOOL PlaySound(
LPCSTR pszSound,
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| HMODULE hmod,
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| DWORD fdwSound
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| );
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Parameters
pszSound
A string that specifies the sound to play. If this parameter is NULL, any
currently playing waveform sound is stopped. To stop a non-waveform sound, specify
SND_PURGE in the fdwSound parameter.
Three flags in fdwSound (SND_ALIAS, SND_FILENAME, and SND_RESOURCE) determine whether the name is
interpreted as an alias for a system event, a filename, or a resource identifier.
If none of these flags are specified, PlaySound searches the registry or the WIN.INI file for an association with the
specified sound name. If an association is found, the sound event is played. If no
association is found in the registry, the name is interpreted as a filename.
hmod
Handle of the executable file that contains the resource to be loaded. This
parameter must be NULL unless SND_RESOURCE is specified in fdwSound.
fdwSound
Flags for playing the sound. The following values are defined:
SND_APPLICATION
The sound is played using an application-specific association.
SND_ALIAS
The pszSound parameter is a system-event alias in the registry or the WIN.INI file. Do not
use with either SND_FILENAME or SND_RESOURCE.
SND_ALIAS_ID
The pszSound parameter is a predefined sound identifier.
SND_ASYNC
The sound is played asynchronously and PlaySound returns immediately after beginning the sound. To terminate an asynchronously
played waveform sound, call PlaySound with pszSound set to NULL.
SND_FILENAME
The pszSound parameter is a filename.
SND_LOOP
The sound plays repeatedly until PlaySound is called again with the pszSound parameter set to NULL. You must also specify the SND_ASYNC flag to indicate
an asynchronous sound event.
SND_MEMORY
A sound event's file is loaded in RAM. The parameter specified by pszSound must point to an image of a sound in memory.
SND_NODEFAULT
No default sound event is used. If the sound cannot be found, PlaySound returns silently without playing the default sound.
SND_NOSTOP
The specified sound event will yield to another sound event that is already
playing. If a sound cannot be played because the resource needed to generate that
sound is busy playing another sound, the function immediately returns FALSE
without playing the requested sound.
If this flag is not specified, PlaySound attempts to stop the currently playing sound so that the device can be used
to play the new sound.
SND_NOWAIT
If the driver is busy, return immediately without playing the sound.
SND_PURGE
Sounds are to be stopped for the calling task. If pszSound is not NULL, all instances of the specified sound are stopped. If pszSound is NULL, all sounds that are playing on behalf of the calling task are
stopped.
You must also specify the instance handle to stop SND_RESOURCE events.
SND_RESOURCE
The pszSound parameter is a resource identifier; hmod must identify the instance that contains the resource.
SND_SYNC
Synchronous playback of a sound event. PlaySound returns after the sound event completes.
Return Values
Returns TRUE if successful or FALSE otherwise.
Remarks
The sound specified by pszSound must fit into available physical memory and be playable by an installed
waveform-audio device driver. PlaySound searches the following directories for sound files: the current directory;
the Windows directory; the Windows system directory; directories listed in the
PATH environment variable; and the list of directories mapped in a network. For
more information about the directory search order, see the documentation for the OpenFile function.
If it cannot find the specified sound, PlaySound uses the default system event sound entry instead. If the function can find
neither the system default entry nor the default sound, it makes no sound and
returns FALSE.
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