LPCSTR pszSound,
HMODULE hmod,
DWORD fdwSound
)
下面是抄的msdn的：
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 identifierhmod 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
directorythe Windows directorythe Windows system directorydirectories
listed in the PATH environment variableand 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.
QuickInfo
Windows NT: Requires version 3.1 or later.
Windows:
Requires Windows 95 or later.
Windows CE:
Unsupported.
Header: Declared in mmsystem.h.
Import
Library: Use winmm.lib.
Unicode: Implemented as Unicode and ANSI
versions on Windows NT.
See Also
Waveform Audio Overview, Waveform Functions
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