Generates simple tones on the speaker.
Parametersfreq : int
Specifies the frequency, in hertz, of the sound. This parameter
must be in the range 37 through 32,767 (0x25 through 0x7FFF).dur : int
Specifies the duration, in milliseconds, of the sound.~
One value has a special meaning: If dwDuration is - 1, the function
operates asynchronously and produces sound until called again.
Win32 API ReferencesSearch for Beep at msdn, google or google groups.