Generates simple tones on the speaker. The function is synchronous; it performs an alertable wait and does not return control to its caller until the sound finishes.

Syntax

BOOL WINAPI Beep(
  __in  DWORD dwFreq,
  __in  DWORD dwDuration
);

Parameters

dwFreq [in]

The frequency of the sound, in hertz. This parameter must be in the range 37 through 32,767 (0x25 through 0x7FFF).

dwDuration [in]

The duration of the sound, in milliseconds.

Return Value

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

Muting and volume controls have no effect on Beep; you will still hear the tone. To silence the tone, use the following commands:

net stop beep

sc config beep start= disabled

Terminal Services:  The beep is redirected to the client.

Windows Vista x64 and Windows XP 64-Bit Edition:  This function is not supported.

Examples

The following example demonstrates the use of this function.

Beep( 750, 300 );

Requirements

See Also

Error Handling Functions

MessageBeep

Notifying the User

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Build date: 7/2/2009